31221222107 has 4 divisors (see below), whose sum is σ = 32228358336. Its totient is φ = 30214085880.

The previous prime is 31221222049. The next prime is 31221222127. The reversal of 31221222107 is 70122212213.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31221222107 - 2¹⁸ = 31220959963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31221222127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 503568068 + ... + 503568129.

It is an arithmetic number, because the mean of its divisors is an integer number (8057089584).

Almost surely, 2^31221222107 is an apocalyptic number.

31221222107 is a deficient number, since it is larger than the sum of its proper divisors (1007136229).

31221222107 is a wasteful number, since it uses less digits than its factorization.

31221222107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1007136228.

The product of its (nonzero) digits is 672, while the sum is 23.

The spelling of 31221222107 in words is "thirty-one billion, two hundred twenty-one million, two hundred twenty-two thousand, one hundred seven".