31221412297 has 2 divisors, whose sum is σ = 31221412298. Its totient is φ = 31221412296.

The previous prime is 31221412207. The next prime is 31221412333. The reversal of 31221412297 is 79221412213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31143778576 + 77633721 = 176476^2 + 8811^2 .

It is a cyclic number.

It is not a de Polignac number, because 31221412297 - 2¹¹ = 31221410249 is a prime.

It is not a weakly prime, because it can be changed into another prime (31221412207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15610706148 + 15610706149.

It is an arithmetic number, because the mean of its divisors is an integer number (15610706149).

Almost surely, 2^31221412297 is an apocalyptic number.

It is an amenable number.

31221412297 is a deficient number, since it is larger than the sum of its proper divisors (1).

31221412297 is an equidigital number, since it uses as much as digits as its factorization.

31221412297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 34.

The spelling of 31221412297 in words is "thirty-one billion, two hundred twenty-one million, four hundred twelve thousand, two hundred ninety-seven".