21110031201 has 16 divisors (see below), whose sum is σ = 32712883200. Its totient is φ = 11858418768.

The previous prime is 21110031179. The next prime is 21110031211. The reversal of 21110031201 is 10213001112.

It is not a de Polignac number, because 21110031201 - 2¹¹ = 21110029153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21110031211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8517741 + ... + 8520218.

It is an arithmetic number, because the mean of its divisors is an integer number (2044555200).

Almost surely, 2^21110031201 is an apocalyptic number.

21110031201 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21110031201 is a deficient number, since it is larger than the sum of its proper divisors (11602851999).

21110031201 is a wasteful number, since it uses less digits than its factorization.

21110031201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17038028.

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 21110031201 its reverse (10213001112), we get a palindrome (31323032313).

The spelling of 21110031201 in words is "twenty-one billion, one hundred ten million, thirty-one thousand, two hundred one".