21114313431 has 4 divisors (see below), whose sum is σ = 28152417912. Its totient is φ = 14076208952.

The previous prime is 21114313411. The next prime is 21114313481. The reversal of 21114313431 is 13431341112.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21114313431 - 2²⁶ = 21047204567 is a prime.

It is a super-2 number, since 2×21114313431² (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 (21114313411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3519052236 + ... + 3519052241.

It is an arithmetic number, because the mean of its divisors is an integer number (7038104478).

Almost surely, 2^21114313431 is an apocalyptic number.

21114313431 is a deficient number, since it is larger than the sum of its proper divisors (7038104481).

21114313431 is an equidigital number, since it uses as much as digits as its factorization.

21114313431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7038104480.

The product of its digits is 864, while the sum is 24.

Adding to 21114313431 its reverse (13431341112), we get a palindrome (34545654543).

The spelling of 21114313431 in words is "twenty-one billion, one hundred fourteen million, three hundred thirteen thousand, four hundred thirty-one".