21122021120202 has 48 divisors (see below), whose sum is σ = 47471872593600. Its totient is φ = 7038816864192.

The previous prime is 21122021120173. The next prime is 21122021120243. The reversal of 21122021120202 is 20202112022112.

It is a happy number.

21122021120202 is a `hidden beast` number, since 2 + 11 + 220 + 211 + 20 + 202 = 666.

It is a super-2 number, since 2×21122021120202² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3885702 + ... + 7572497.

It is an arithmetic number, because the mean of its divisors is an integer number (988997345700).

Almost surely, 2^{21122021120202} is an apocalyptic number.

21122021120202 is an abundant number, since it is smaller than the sum of its proper divisors (26349851473398).

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

21122021120202 is a wasteful number, since it uses less digits than its factorization.

21122021120202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11462009 (or 11461997 counting only the distinct ones).

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

Adding to 21122021120202 its reverse (20202112022112), we get a palindrome (41324133142314).

The spelling of 21122021120202 in words is "twenty-one trillion, one hundred twenty-two billion, twenty-one million, one hundred twenty thousand, two hundred two".