21332131031 has 2 divisors, whose sum is σ = 21332131032. Its totient is φ = 21332131030.

The previous prime is 21332130959. The next prime is 21332131033. The reversal of 21332131031 is 13013123312.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21332131031 is a prime.

It is a super-2 number, since 2×21332131031² (a number of 21 digits) contains 22 as substring.

Together with 21332131033, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 21332130994 and 21332131012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21332131033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10666065515 + 10666065516.

It is an arithmetic number, because the mean of its divisors is an integer number (10666065516).

Almost surely, 2^21332131031 is an apocalyptic number.

21332131031 is a deficient number, since it is larger than the sum of its proper divisors (1).

21332131031 is an equidigital number, since it uses as much as digits as its factorization.

21332131031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 21332131031 its reverse (13013123312), we get a palindrome (34345254343).

The spelling of 21332131031 in words is "twenty-one billion, three hundred thirty-two million, one hundred thirty-one thousand, thirty-one".