31221412207 has 2 divisors, whose sum is σ = 31221412208. Its totient is φ = 31221412206.

The previous prime is 31221412153. The next prime is 31221412297. The reversal of 31221412207 is 70221412213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31221412207 - 2¹¹ = 31221410159 is a prime.

It is a super-2 number, since 2×31221412207² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31221412297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15610706103 + 15610706104.

It is an arithmetic number, because the mean of its divisors is an integer number (15610706104).

Almost surely, 2^31221412207 is an apocalyptic number.

31221412207 is a deficient number, since it is larger than the sum of its proper divisors (1).

31221412207 is an equidigital number, since it uses as much as digits as its factorization.

31221412207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 25.

The spelling of 31221412207 in words is "thirty-one billion, two hundred twenty-one million, four hundred twelve thousand, two hundred seven".