31120003020 has 24 divisors (see below), whose sum is σ = 87136008624. Its totient is φ = 8298667456.

The previous prime is 31120002973. The next prime is 31120003087. The reversal of 31120003020 is 2030002113.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 31120002987 and 31120003005.

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, 259333299 + ... + 259333418.

It is an arithmetic number, because the mean of its divisors is an integer number (3630667026).

Almost surely, 2^31120003020 is an apocalyptic number.

31120003020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31120003020 is an abundant number, since it is smaller than the sum of its proper divisors (56016005604).

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

31120003020 is a wasteful number, since it uses less digits than its factorization.

31120003020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518666729 (or 518666727 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

Adding to 31120003020 its reverse (2030002113), we get a palindrome (33150005133).

The spelling of 31120003020 in words is "thirty-one billion, one hundred twenty million, three thousand, twenty".