21111112001022 has 16 divisors (see below), whose sum is σ = 42222929258640. Its totient is φ = 7036919790912.

The previous prime is 21111112000967. The next prime is 21111112001027. The reversal of 21111112001022 is 22010021111112.

It is a happy number.

It is a super-2 number, since 2×21111112001022² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21111112000992 and 21111112001010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21111112001027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28996153 + ... + 29715300.

It is an arithmetic number, because the mean of its divisors is an integer number (2638933078665).

Almost surely, 2^{21111112001022} is an apocalyptic number.

21111112001022 is an abundant number, since it is smaller than the sum of its proper divisors (21111817257618).

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

21111112001022 is a wasteful number, since it uses less digits than its factorization.

21111112001022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58771387.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21111112001022 its reverse (22010021111112), we get a palindrome (43121133112134).

The spelling of 21111112001022 in words is "twenty-one trillion, one hundred eleven billion, one hundred twelve million, one thousand, twenty-two".