21111222022110 has 64 divisors (see below), whose sum is σ = 61414464072960. Its totient is φ = 5117872004640.

The previous prime is 21111222022103. The next prime is 21111222022157. The reversal of 21111222022110 is 1122022211112.

21111222022110 is a `hidden beast` number, since 211 + 1 + 1 + 2 + 220 + 221 + 10 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3554074812 + ... + 3554080751.

It is an arithmetic number, because the mean of its divisors is an integer number (959601001140).

Almost surely, 2^{21111222022110} is an apocalyptic number.

21111222022110 is an abundant number, since it is smaller than the sum of its proper divisors (40303242050850).

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

21111222022110 is a wasteful number, since it uses less digits than its factorization.

21111222022110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7108155590 (or 7108155584 counting only the distinct ones).

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

Adding to 21111222022110 its reverse (1122022211112), we get a palindrome (22233244233222).

It can be divided in two parts, 211112 and 22022110, that added together give a palindrome (22233222).

The spelling of 21111222022110 in words is "twenty-one trillion, one hundred eleven billion, two hundred twenty-two million, twenty-two thousand, one hundred ten".