21110312320110 has 48 divisors (see below), whose sum is σ = 59108874499584. Its totient is φ = 5196384570816.

The previous prime is 21110312320099. The next prime is 21110312320183. The reversal of 21110312320110 is 1102321301112.

21110312320110 is a `hidden beast` number, since 2 + 11 + 10 + 312 + 320 + 1 + 10 = 666.

It is a super-2 number, since 2×21110312320110² (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 an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9021499822 + ... + 9021502161.

It is an arithmetic number, because the mean of its divisors is an integer number (1231434885408).

Almost surely, 2^{21110312320110} is an apocalyptic number.

21110312320110 is an abundant number, since it is smaller than the sum of its proper divisors (37998562179474).

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

21110312320110 is a wasteful number, since it uses less digits than its factorization.

21110312320110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18043002009 (or 18043002006 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 21110312320110 its reverse (1102321301112), we get a palindrome (22212633621222).

The spelling of 21110312320110 in words is "twenty-one trillion, one hundred ten billion, three hundred twelve million, three hundred twenty thousand, one hundred ten".