31223222122 has 4 divisors (see below), whose sum is σ = 46834833186. Its totient is φ = 15611611060.

The previous prime is 31223222077. The next prime is 31223222143. The reversal of 31223222122 is 22122232213.

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

It can be written as a sum of positive squares in only one way, i.e., 23207780281 + 8015441841 = 152341^2 + 89529^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31223222093 and 31223222102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7805805529 + ... + 7805805532.

Almost surely, 2^31223222122 is an apocalyptic number.

31223222122 is a deficient number, since it is larger than the sum of its proper divisors (15611611064).

31223222122 is a wasteful number, since it uses less digits than its factorization.

31223222122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15611611063.

The product of its digits is 1152, while the sum is 22.

Adding to 31223222122 its reverse (22122232213), we get a palindrome (53345454335).

The spelling of 31223222122 in words is "thirty-one billion, two hundred twenty-three million, two hundred twenty-two thousand, one hundred twenty-two".