31130110220 has 24 divisors (see below), whose sum is σ = 71316253008. Its totient is φ = 11320040000.

The previous prime is 31130110211. The next prime is 31130110223. The reversal of 31130110220 is 2201103113.

It is a junction number, because it is equal to n+sod(n) for n = 31130110195 and 31130110204.

It is not an unprimeable number, because it can be changed into a prime (31130110223) 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, 70750031 + ... + 70750470.

It is an arithmetic number, because the mean of its divisors is an integer number (2971510542).

Almost surely, 2^31130110220 is an apocalyptic number.

It is an amenable number.

31130110220 is an abundant number, since it is smaller than the sum of its proper divisors (40186142788).

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

31130110220 is a wasteful number, since it uses less digits than its factorization.

31130110220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141500521 (or 141500519 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 31130110220 its reverse (2201103113), we get a palindrome (33331213333).

The spelling of 31130110220 in words is "thirty-one billion, one hundred thirty million, one hundred ten thousand, two hundred twenty".