21114201231 has 64 divisors (see below), whose sum is σ = 33603993600. Its totient is φ = 13226976000.

The previous prime is 21114201223. The next prime is 21114201233. The reversal of 21114201231 is 13210241112.

21114201231 is a `hidden beast` number, since 2 + 1 + 11 + 420 + 1 + 231 = 666.

It is not a de Polignac number, because 21114201231 - 2³ = 21114201223 is a prime.

It is a super-2 number, since 2×21114201231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21114201233) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5275231 + ... + 5279231.

It is an arithmetic number, because the mean of its divisors is an integer number (525062400).

Almost surely, 2^21114201231 is an apocalyptic number.

21114201231 is a deficient number, since it is larger than the sum of its proper divisors (12489792369).

21114201231 is an equidigital number, since it uses as much as digits as its factorization.

21114201231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4168 (or 4150 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 21114201231 its reverse (13210241112), we get a palindrome (34324442343).

The spelling of 21114201231 in words is "twenty-one billion, one hundred fourteen million, two hundred one thousand, two hundred thirty-one".