20112121121022 has 96 divisors (see below), whose sum is σ = 49957472597760. Its totient is φ = 5728344969600.

The previous prime is 20112121121009. The next prime is 20112121121023. The reversal of 20112121121022 is 22012112121102.

20112121121022 is a `hidden beast` number, since 201 + 1 + 21 + 211 + 210 + 22 = 666.

It is a super-3 number, since 3×20112121121022³ (a number of 41 digits) contains 333 as substring.

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 = 20112121120986 and 20112121121004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112121121023) 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, 51526429 + ... + 51915287.

It is an arithmetic number, because the mean of its divisors is an integer number (520390339560).

Almost surely, 2^{20112121121022} is an apocalyptic number.

20112121121022 is an abundant number, since it is smaller than the sum of its proper divisors (29845351476738).

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

20112121121022 is a wasteful number, since it uses less digits than its factorization.

20112121121022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390158 (or 390155 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 20112121121022 its reverse (22012112121102), we get a palindrome (42124233242124).

The spelling of 20112121121022 in words is "twenty trillion, one hundred twelve billion, one hundred twenty-one million, one hundred twenty-one thousand, twenty-two".