31310220001 has 2 divisors, whose sum is σ = 31310220002. Its totient is φ = 31310220000.

The previous prime is 31310219989. The next prime is 31310220043. The reversal of 31310220001 is 10002201313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25715329600 + 5594890401 = 160360^2 + 74799^2 .

It is a cyclic number.

It is not a de Polignac number, because 31310220001 - 2¹⁹ = 31309695713 is a prime.

It is a super-2 number, since 2×31310220001² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31310220701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15655110000 + 15655110001.

It is an arithmetic number, because the mean of its divisors is an integer number (15655110001).

Almost surely, 2^31310220001 is an apocalyptic number.

It is an amenable number.

31310220001 is a deficient number, since it is larger than the sum of its proper divisors (1).

31310220001 is an equidigital number, since it uses as much as digits as its factorization.

31310220001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 31310220001 its reverse (10002201313), we get a palindrome (41312421314).

The spelling of 31310220001 in words is "thirty-one billion, three hundred ten million, two hundred twenty thousand, one".