21014131331 has 2 divisors, whose sum is σ = 21014131332. Its totient is φ = 21014131330.

The previous prime is 21014131213. The next prime is 21014131343. The reversal of 21014131331 is 13313141012.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21014131331 is a prime.

It is a super-2 number, since 2×21014131331² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (21014131381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10507065665 + 10507065666.

It is an arithmetic number, because the mean of its divisors is an integer number (10507065666).

Almost surely, 2^21014131331 is an apocalyptic number.

21014131331 is a deficient number, since it is larger than the sum of its proper divisors (1).

21014131331 is an equidigital number, since it uses as much as digits as its factorization.

21014131331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 21014131331 its reverse (13313141012), we get a palindrome (34327272343).

The spelling of 21014131331 in words is "twenty-one billion, fourteen million, one hundred thirty-one thousand, three hundred thirty-one".