31023120022 has 4 divisors (see below), whose sum is σ = 46534680036. Its totient is φ = 15511560010.

The previous prime is 31023120019. The next prime is 31023120041. The reversal of 31023120022 is 22002132013.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22002132013 = 457 ⋅48144709.

It is a junction number, because it is equal to n+sod(n) for n = 31023119978 and 31023120005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7755780004 + ... + 7755780007.

It is an arithmetic number, because the mean of its divisors is an integer number (11633670009).

Almost surely, 2^31023120022 is an apocalyptic number.

31023120022 is a deficient number, since it is larger than the sum of its proper divisors (15511560014).

31023120022 is a wasteful number, since it uses less digits than its factorization.

31023120022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15511560013.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 31023120022 its reverse (22002132013), we get a palindrome (53025252035).

The spelling of 31023120022 in words is "thirty-one billion, twenty-three million, one hundred twenty thousand, twenty-two".