21112012222110 has 96 divisors (see below), whose sum is σ = 55038213715680. Its totient is φ = 5614801265664.

The previous prime is 21112012222087. The next prime is 21112012222123. The reversal of 21112012222110 is 1122221021112.

21112012222110 is a `hidden beast` number, since 21 + 11 + 201 + 222 + 211 + 0 = 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 47 ways as a sum of consecutive naturals, for example, 163997829 + ... + 164126511.

It is an arithmetic number, because the mean of its divisors is an integer number (573314726205).

Almost surely, 2^{21112012222110} is an apocalyptic number.

21112012222110 is an abundant number, since it is smaller than the sum of its proper divisors (33926201493570).

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

21112012222110 is a wasteful number, since it uses less digits than its factorization.

21112012222110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133562 (or 133559 counting only the distinct ones).

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

Adding to 21112012222110 its reverse (1122221021112), we get a palindrome (22234233243222).

The spelling of 21112012222110 in words is "twenty-one trillion, one hundred twelve billion, twelve million, two hundred twenty-two thousand, one hundred ten".