31123130222 has 16 divisors (see below), whose sum is σ = 49466722032. Its totient is φ = 14635551360.

The previous prime is 31123130219. The next prime is 31123130249. The reversal of 31123130222 is 22203132113.

It is a junction number, because it is equal to n+sod(n) for n = 31123130194 and 31123130203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 284468 + ... + 378375.

It is an arithmetic number, because the mean of its divisors is an integer number (3091670127).

Almost surely, 2^31123130222 is an apocalyptic number.

31123130222 is a deficient number, since it is larger than the sum of its proper divisors (18343591810).

31123130222 is a wasteful number, since it uses less digits than its factorization.

31123130222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664243.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 31123130222 its reverse (22203132113), we get a palindrome (53326262335).

The spelling of 31123130222 in words is "thirty-one billion, one hundred twenty-three million, one hundred thirty thousand, two hundred twenty-two".