20111220121022 has 32 divisors (see below), whose sum is σ = 31349294417664. Its totient is φ = 9665860089600.

The previous prime is 20111220120989. The next prime is 20111220121043. The reversal of 20111220121022 is 22012102211102.

It is a super-2 number, since 2×20111220121022² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27487898 + ... + 28210050.

It is an arithmetic number, because the mean of its divisors is an integer number (979665450552).

Almost surely, 2^{20111220121022} is an apocalyptic number.

20111220121022 is a deficient number, since it is larger than the sum of its proper divisors (11238074296642).

20111220121022 is a wasteful number, since it uses less digits than its factorization.

20111220121022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725204.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20111220121022 its reverse (22012102211102), we get a palindrome (42123322332124).

The spelling of 20111220121022 in words is "twenty trillion, one hundred eleven billion, two hundred twenty million, one hundred twenty-one thousand, twenty-two".