31020002130973 has 2 divisors, whose sum is σ = 31020002130974. Its totient is φ = 31020002130972.

The previous prime is 31020002130829. The next prime is 31020002131031. The reversal of 31020002130973 is 37903120002013.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24202247698084 + 6817754432889 = 4919578^2 + 2611083^2 .

It is a cyclic number.

It is not a de Polignac number, because 31020002130973 - 2⁹ = 31020002130461 is a prime.

It is a super-2 number, since 2×31020002130973² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31020002130473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15510001065486 + 15510001065487.

It is an arithmetic number, because the mean of its divisors is an integer number (15510001065487).

Almost surely, 2^{31020002130973} is an apocalyptic number.

It is an amenable number.

31020002130973 is a deficient number, since it is larger than the sum of its proper divisors (1).

31020002130973 is an equidigital number, since it uses as much as digits as its factorization.

31020002130973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 31.

Adding to 31020002130973 its reverse (37903120002013), we get a palindrome (68923122132986).

The spelling of 31020002130973 in words is "thirty-one trillion, twenty billion, two million, one hundred thirty thousand, nine hundred seventy-three".