31302200002121 has 2 divisors, whose sum is σ = 31302200002122. Its totient is φ = 31302200002120.

The previous prime is 31302200002111. The next prime is 31302200002133. The reversal of 31302200002121 is 12120000220313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30553864278025 + 748335724096 = 5527555^2 + 865064^2 .

It is a cyclic number.

It is not a de Polignac number, because 31302200002121 - 2³⁴ = 31285020132937 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31302200002121.

It is not a weakly prime, because it can be changed into another prime (31302200002111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15651100001060 + 15651100001061.

It is an arithmetic number, because the mean of its divisors is an integer number (15651100001061).

Almost surely, 2^{31302200002121} is an apocalyptic number.

It is an amenable number.

31302200002121 is a deficient number, since it is larger than the sum of its proper divisors (1).

31302200002121 is an equidigital number, since it uses as much as digits as its factorization.

31302200002121 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 31302200002121 its reverse (12120000220313), we get a palindrome (43422200222434).

The spelling of 31302200002121 in words is "thirty-one trillion, three hundred two billion, two hundred million, two thousand, one hundred twenty-one".