21112121022 has 32 divisors (see below), whose sum is σ = 43631032320. Its totient is φ = 6803374560.

The previous prime is 21112121011. The next prime is 21112121059. The reversal of 21112121022 is 22012121112.

It is a junction number, because it is equal to n+sod(n) for n = 21112120992 and 21112121010.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125104 + ... + 240572.

It is an arithmetic number, because the mean of its divisors is an integer number (1363469760).

Almost surely, 2^21112121022 is an apocalyptic number.

21112121022 is an abundant number, since it is smaller than the sum of its proper divisors (22518911298).

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

21112121022 is a wasteful number, since it uses less digits than its factorization.

21112121022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116488.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21112121022 its reverse (22012121112), we get a palindrome (43124242134).

The spelling of 21112121022 in words is "twenty-one billion, one hundred twelve million, one hundred twenty-one thousand, twenty-two".