31321042001 has 2 divisors, whose sum is σ = 31321042002. Its totient is φ = 31321042000.

The previous prime is 31321041989. The next prime is 31321042091. The reversal of 31321042001 is 10024012313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31004166400 + 316875601 = 176080^2 + 17801^2 .

It is a cyclic number.

It is not a de Polignac number, because 31321042001 - 2³⁰ = 30247300177 is a prime.

It is not a weakly prime, because it can be changed into another prime (31321042091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15660521000 + 15660521001.

It is an arithmetic number, because the mean of its divisors is an integer number (15660521001).

Almost surely, 2^31321042001 is an apocalyptic number.

It is an amenable number.

31321042001 is a deficient number, since it is larger than the sum of its proper divisors (1).

31321042001 is an equidigital number, since it uses as much as digits as its factorization.

31321042001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 31321042001 its reverse (10024012313), we get a palindrome (41345054314).

The spelling of 31321042001 in words is "thirty-one billion, three hundred twenty-one million, forty-two thousand, one".