31032302012021 has 2 divisors, whose sum is σ = 31032302012022. Its totient is φ = 31032302012020.

The previous prime is 31032302012011. The next prime is 31032302012051. The reversal of 31032302012021 is 12021020323013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25330183068100 + 5702118943921 = 5032910^2 + 2387911^2 .

It is a cyclic number.

It is not a de Polignac number, because 31032302012021 - 2³⁰ = 31031228270197 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31032302011984 and 31032302012002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31032302012011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15516151006010 + 15516151006011.

It is an arithmetic number, because the mean of its divisors is an integer number (15516151006011).

Almost surely, 2^{31032302012021} is an apocalyptic number.

It is an amenable number.

31032302012021 is a deficient number, since it is larger than the sum of its proper divisors (1).

31032302012021 is an equidigital number, since it uses as much as digits as its factorization.

31032302012021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 31032302012021 its reverse (12021020323013), we get a palindrome (43053322335034).

The spelling of 31032302012021 in words is "thirty-one trillion, thirty-two billion, three hundred two million, twelve thousand, twenty-one".