21111122022 has 16 divisors (see below), whose sum is σ = 42279079680. Its totient is φ = 7027568072.

The previous prime is 21111122003. The next prime is 21111122093. The reversal of 21111122022 is 22022111112.

It is a junction number, because it is equal to n+sod(n) for n = 21111121992 and 21111122010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2363322 + ... + 2372237.

It is an arithmetic number, because the mean of its divisors is an integer number (2642442480).

Almost surely, 2^21111122022 is an apocalyptic number.

21111122022 is an abundant number, since it is smaller than the sum of its proper divisors (21167957658).

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

21111122022 is a wasteful number, since it uses less digits than its factorization.

21111122022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4736307.

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

Adding to 21111122022 its reverse (22022111112), we get a palindrome (43133233134).

The spelling of 21111122022 in words is "twenty-one billion, one hundred eleven million, one hundred twenty-two thousand, twenty-two".