20222121111220 has 96 divisors (see below), whose sum is σ = 48627111633408. Its totient is φ = 6919874260992.

The previous prime is 20222121111197. The next prime is 20222121111223. The reversal of 20222121111220 is 2211112122202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20222121111223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 286141609 + ... + 286212271.

It is an arithmetic number, because the mean of its divisors is an integer number (506532412848).

Almost surely, 2^{20222121111220} is an apocalyptic number.

20222121111220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20222121111220 is an abundant number, since it is smaller than the sum of its proper divisors (28404990522188).

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

20222121111220 is a wasteful number, since it uses less digits than its factorization.

20222121111220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74609 (or 74607 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 20222121111220 its reverse (2211112122202), we get a palindrome (22433233233422).

The spelling of 20222121111220 in words is "twenty trillion, two hundred twenty-two billion, one hundred twenty-one million, one hundred eleven thousand, two hundred twenty".