31220034120 has 160 divisors (see below), whose sum is σ = 114473589120. Its totient is φ = 7568484480.

The previous prime is 31220034107. The next prime is 31220034133. The reversal of 31220034120 is 2143002213.

31220034120 is a `hidden beast` number, since 31 + 220 + 0 + 3 + 412 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (31220034107) and next prime (31220034133).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 31220034093 and 31220034102.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 402352 + ... + 473631.

It is an arithmetic number, because the mean of its divisors is an integer number (715459932).

Almost surely, 2^31220034120 is an apocalyptic number.

31220034120 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31220034120 is an abundant number, since it is smaller than the sum of its proper divisors (83253555000).

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

31220034120 is a wasteful number, since it uses less digits than its factorization.

31220034120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 876017 (or 876004 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 31220034120 its reverse (2143002213), we get a palindrome (33363036333).

The spelling of 31220034120 in words is "thirty-one billion, two hundred twenty million, thirty-four thousand, one hundred twenty".