21112220122002 has 24 divisors (see below), whose sum is σ = 45743555497536. Its totient is φ = 7037343338136.

The previous prime is 21112220121983. The next prime is 21112220122027. The reversal of 21112220122002 is 20022102221112.

It is a happy number.

21112220122002 is a `hidden beast` number, since 211 + 12 + 220 + 1 + 220 + 0 + 2 = 666.

It is a super-2 number, since 2×21112220122002² (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 an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3204198 + ... + 7245089.

It is an arithmetic number, because the mean of its divisors is an integer number (1905981479064).

Almost surely, 2^{21112220122002} is an apocalyptic number.

21112220122002 is an abundant number, since it is smaller than the sum of its proper divisors (24631335375534).

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

21112220122002 is a wasteful number, since it uses less digits than its factorization.

21112220122002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10561542 (or 10561539 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 21112220122002 its reverse (20022102221112), we get a palindrome (41134322343114).

The spelling of 21112220122002 in words is "twenty-one trillion, one hundred twelve billion, two hundred twenty million, one hundred twenty-two thousand, two".