31123201130 has 192 divisors, whose sum is σ = 69683162112. Its totient is φ = 9963233280.

The previous prime is 31123201117. The next prime is 31123201139. The reversal of 31123201130 is 3110232113.

It is a junction number, because it is equal to n+sod(n) for n = 31123201099 and 31123201108.

It is not an unprimeable number, because it can be changed into a prime (31123201139) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 53939402 + ... + 53939978.

It is an arithmetic number, because the mean of its divisors is an integer number (362933136).

Almost surely, 2^31123201130 is an apocalyptic number.

31123201130 is an abundant number, since it is smaller than the sum of its proper divisors (38559960982).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31123201130 is a wasteful number, since it uses less digits than its factorization.

31123201130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 749 (or 742 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 31123201130 its reverse (3110232113), we get a palindrome (34233433243).

The spelling of 31123201130 in words is "thirty-one billion, one hundred twenty-three million, two hundred one thousand, one hundred thirty".