2122211021220 has 72 divisors (see below), whose sum is σ = 6594382562040. Its totient is φ = 552119938560.

The previous prime is 2122211021219. The next prime is 2122211021221. The reversal of 2122211021220 is 221201122212.

It is a happy number.

2122211021220 is a `hidden beast` number, since 212 + 2 + 211 + 0 + 21 + 220 = 666.

It is an interprime number because it is at equal distance from previous prime (2122211021219) and next prime (2122211021221).

It can be written as a sum of positive squares in 4 ways, for example, as 263095133184 + 1859115888036 = 512928^2 + 1363494^2 .

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 = 2122211021193 and 2122211021202.

It is not an unprimeable number, because it can be changed into a prime (2122211021221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 143773855 + ... + 143788614.

It is an arithmetic number, because the mean of its divisors is an integer number (91588646695).

Almost surely, 2^{2122211021220} is an apocalyptic number.

2122211021220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2122211021220 is an abundant number, since it is smaller than the sum of its proper divisors (4472171540820).

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

2122211021220 is a wasteful number, since it uses less digits than its factorization.

2122211021220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287562525 (or 287562520 counting only the distinct ones).

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

Adding to 2122211021220 its reverse (221201122212), we get a palindrome (2343412143432).

The spelling of 2122211021220 in words is "two trillion, one hundred twenty-two billion, two hundred eleven million, twenty-one thousand, two hundred twenty".