21325131313037 has 2 divisors, whose sum is σ = 21325131313038. Its totient is φ = 21325131313036.

The previous prime is 21325131313033. The next prime is 21325131313081. The reversal of 21325131313037 is 73031313152312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11673012063241 + 9652119249796 = 3416579^2 + 3106786^2 .

It is a cyclic number.

It is not a de Polignac number, because 21325131313037 - 2² = 21325131313033 is a prime.

It is a super-2 number, since 2×21325131313037² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21325131312988 and 21325131313006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21325131313033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10662565656518 + 10662565656519.

It is an arithmetic number, because the mean of its divisors is an integer number (10662565656519).

Almost surely, 2^{21325131313037} is an apocalyptic number.

It is an amenable number.

21325131313037 is a deficient number, since it is larger than the sum of its proper divisors (1).

21325131313037 is an equidigital number, since it uses as much as digits as its factorization.

21325131313037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34020, while the sum is 35.

Adding to 21325131313037 its reverse (73031313152312), we get a palindrome (94356444465349).

The spelling of 21325131313037 in words is "twenty-one trillion, three hundred twenty-five billion, one hundred thirty-one million, three hundred thirteen thousand, thirty-seven".