31126409801 has 2 divisors, whose sum is σ = 31126409802. Its totient is φ = 31126409800.

The previous prime is 31126409789. The next prime is 31126409849. The reversal of 31126409801 is 10890462113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25504409401 + 5622000400 = 159701^2 + 74980^2 .

It is a cyclic number.

It is not a de Polignac number, because 31126409801 - 2⁶ = 31126409737 is a prime.

It is not a weakly prime, because it can be changed into another prime (31126409201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15563204900 + 15563204901.

It is an arithmetic number, because the mean of its divisors is an integer number (15563204901).

Almost surely, 2^31126409801 is an apocalyptic number.

It is an amenable number.

31126409801 is a deficient number, since it is larger than the sum of its proper divisors (1).

31126409801 is an equidigital number, since it uses as much as digits as its factorization.

31126409801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 35.

The spelling of 31126409801 in words is "thirty-one billion, one hundred twenty-six million, four hundred nine thousand, eight hundred one".