20201211221022 has 128 divisors (see below), whose sum is σ = 48427599467520. Its totient is φ = 6205115030400.

The previous prime is 20201211221003. The next prime is 20201211221039. The reversal of 20201211221022 is 22012211210202.

It is a happy number.

20201211221022 is a `hidden beast` number, since 20 + 201 + 211 + 2 + 210 + 22 = 666.

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 = 20201211220986 and 20201211221004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2271581208 + ... + 2271590100.

It is an arithmetic number, because the mean of its divisors is an integer number (378340620840).

Almost surely, 2^{20201211221022} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20201211221022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24213799733760).

20201211221022 is an abundant number, since it is smaller than the sum of its proper divisors (28226388246498).

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

20201211221022 is a wasteful number, since it uses less digits than its factorization.

20201211221022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14095 (or 14089 counting only the distinct ones).

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

Adding to 20201211221022 its reverse (22012211210202), we get a palindrome (42213422431224).

The spelling of 20201211221022 in words is "twenty trillion, two hundred one billion, two hundred eleven million, two hundred twenty-one thousand, twenty-two".