2122111222020 has 144 divisors (see below), whose sum is σ = 6526572382512. Its totient is φ = 558031196160.

The previous prime is 2122111222003. The next prime is 2122111222027. The reversal of 2122111222020 is 202221112212.

It is a happy number.

2122111222020 is a `hidden beast` number, since 212 + 211 + 1 + 2 + 220 + 20 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 841809920004 + 1280301302016 = 917502^2 + 1131504^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 2122111221984 and 2122111222002.

It is not an unprimeable number, because it can be changed into a prime (2122111222027) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 79523080 + ... + 79549760.

It is an arithmetic number, because the mean of its divisors is an integer number (45323419323).

Almost surely, 2^{2122111222020} is an apocalyptic number.

2122111222020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2122111222020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3263286191256).

2122111222020 is an abundant number, since it is smaller than the sum of its proper divisors (4404461160492).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2122111222020 is a wasteful number, since it uses less digits than its factorization.

2122111222020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32822 (or 32817 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 2122111222020 its reverse (202221112212), we get a palindrome (2324332334232).

The spelling of 2122111222020 in words is "two trillion, one hundred twenty-two billion, one hundred eleven million, two hundred twenty-two thousand, twenty".