21122110221102 has 24 divisors (see below), whose sum is σ = 49924987795800. Its totient is φ = 6400639460880.

The previous prime is 21122110221031. The next prime is 21122110221109. The reversal of 21122110221102 is 20112201122112.

21122110221102 is a `hidden beast` number, since 211 + 22 + 110 + 221 + 102 = 666.

It is a super-2 number, since 2×21122110221102² (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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122110221109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53338661977 + ... + 53338662372.

It is an arithmetic number, because the mean of its divisors is an integer number (2080207824825).

Almost surely, 2^{21122110221102} is an apocalyptic number.

21122110221102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21122110221102 is an abundant number, since it is smaller than the sum of its proper divisors (28802877574698).

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

21122110221102 is a wasteful number, since it uses less digits than its factorization.

21122110221102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106677324368 (or 106677324365 counting only the distinct ones).

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

Adding to 21122110221102 its reverse (20112201122112), we get a palindrome (41234311343214).

The spelling of 21122110221102 in words is "twenty-one trillion, one hundred twenty-two billion, one hundred ten million, two hundred twenty-one thousand, one hundred two".