21201012201110 has 24 divisors (see below), whose sum is σ = 44392323507840. Its totient is φ = 7268918468784.

The previous prime is 21201012201053. The next prime is 21201012201169. The reversal of 21201012201110 is 1110221010212.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

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, 21633685430 + ... + 21633686409.

It is an arithmetic number, because the mean of its divisors is an integer number (1849680146160).

Almost surely, 2^{21201012201110} is an apocalyptic number.

21201012201110 is an abundant number, since it is smaller than the sum of its proper divisors (23191311306730).

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

21201012201110 is a wasteful number, since it uses less digits than its factorization.

21201012201110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43267371860 (or 43267371853 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21201012201110 its reverse (1110221010212), we get a palindrome (22311233211322).

The spelling of 21201012201110 in words is "twenty-one trillion, two hundred one billion, twelve million, two hundred one thousand, one hundred ten".