31103220122 has 16 divisors (see below), whose sum is σ = 50993571552. Its totient is φ = 14141072880.

The previous prime is 31103220121. The next prime is 31103220131. The reversal of 31103220122 is 22102230113.

It is a self number, because there is not a number n which added to its sum of digits gives 31103220122.

It is not an unprimeable number, because it can be changed into a prime (31103220121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8925704 + ... + 8929187.

It is an arithmetic number, because the mean of its divisors is an integer number (3187098222).

Almost surely, 2^31103220122 is an apocalyptic number.

31103220122 is a deficient number, since it is larger than the sum of its proper divisors (19890351430).

31103220122 is a wasteful number, since it uses less digits than its factorization.

31103220122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17854973.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 31103220122 its reverse (22102230113), we get a palindrome (53205450235).

Subtracting from 31103220122 its reverse (22102230113), we obtain a palindrome (9000990009).

The spelling of 31103220122 in words is "thirty-one billion, one hundred three million, two hundred twenty thousand, one hundred twenty-two".