21310882031 has 2 divisors, whose sum is σ = 21310882032. Its totient is φ = 21310882030.

The previous prime is 21310882027. The next prime is 21310882091. The reversal of 21310882031 is 13028801312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21310882031 - 2² = 21310882027 is a prime.

It is a super-2 number, since 2×21310882031² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 21310881985 and 21310882003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21310882091) 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 as a sum of consecutive naturals, namely, 10655441015 + 10655441016.

It is an arithmetic number, because the mean of its divisors is an integer number (10655441016).

Almost surely, 2^21310882031 is an apocalyptic number.

21310882031 is a deficient number, since it is larger than the sum of its proper divisors (1).

21310882031 is an equidigital number, since it uses as much as digits as its factorization.

21310882031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 29.

The spelling of 21310882031 in words is "twenty-one billion, three hundred ten million, eight hundred eighty-two thousand, thirty-one".