21320123300131 has 2 divisors, whose sum is σ = 21320123300132. Its totient is φ = 21320123300130.

The previous prime is 21320123300123. The next prime is 21320123300263. The reversal of 21320123300131 is 13100332102312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21320123300131 - 2³ = 21320123300123 is a prime.

It is a super-2 number, since 2×21320123300131² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21320123300431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10660061650065 + 10660061650066.

It is an arithmetic number, because the mean of its divisors is an integer number (10660061650066).

Almost surely, 2^{21320123300131} is an apocalyptic number.

21320123300131 is a deficient number, since it is larger than the sum of its proper divisors (1).

21320123300131 is an equidigital number, since it uses as much as digits as its factorization.

21320123300131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 21320123300131 its reverse (13100332102312), we get a palindrome (34420455402443).

The spelling of 21320123300131 in words is "twenty-one trillion, three hundred twenty billion, one hundred twenty-three million, three hundred thousand, one hundred thirty-one".