23131002001 has 2 divisors, whose sum is σ = 23131002002. Its totient is φ = 23131002000.

The previous prime is 23131001969. The next prime is 23131002007. The reversal of 23131002001 is 10020013132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18915876225 + 4215125776 = 137535^2 + 64924^2 .

It is a cyclic number.

It is not a de Polignac number, because 23131002001 - 2⁵ = 23131001969 is a prime.

It is not a weakly prime, because it can be changed into another prime (23131002007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11565501000 + 11565501001.

It is an arithmetic number, because the mean of its divisors is an integer number (11565501001).

Almost surely, 2^23131002001 is an apocalyptic number.

It is an amenable number.

23131002001 is a deficient number, since it is larger than the sum of its proper divisors (1).

23131002001 is an equidigital number, since it uses as much as digits as its factorization.

23131002001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 23131002001 its reverse (10020013132), we get a palindrome (33151015133).

The spelling of 23131002001 in words is "twenty-three billion, one hundred thirty-one million, two thousand, one".