21320331032131 has 2 divisors, whose sum is σ = 21320331032132. Its totient is φ = 21320331032130.

The previous prime is 21320331032107. The next prime is 21320331032137. The reversal of 21320331032131 is 13123013302312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21320331032131 - 2¹¹ = 21320331030083 is a prime.

It is a super-2 number, since 2×21320331032131² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21320331032096 and 21320331032105.

It is not a weakly prime, because it can be changed into another prime (21320331032137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10660165516065 + 10660165516066.

It is an arithmetic number, because the mean of its divisors is an integer number (10660165516066).

Almost surely, 2^{21320331032131} is an apocalyptic number.

21320331032131 is a deficient number, since it is larger than the sum of its proper divisors (1).

21320331032131 is an equidigital number, since it uses as much as digits as its factorization.

21320331032131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 21320331032131 its reverse (13123013302312), we get a palindrome (34443344334443).

The spelling of 21320331032131 in words is "twenty-one trillion, three hundred twenty billion, three hundred thirty-one million, thirty-two thousand, one hundred thirty-one".