31300042120 has 32 divisors (see below), whose sum is σ = 70460020800. Its totient is φ = 12513807808.

The previous prime is 31300042093. The next prime is 31300042139. The reversal of 31300042120 is 2124000313.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31300042094 and 31300042103.

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, 111940 + ... + 274099.

It is an arithmetic number, because the mean of its divisors is an integer number (2201875650).

Almost surely, 2^31300042120 is an apocalyptic number.

It is an amenable number.

31300042120 is an abundant number, since it is smaller than the sum of its proper divisors (39159978680).

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

31300042120 is a wasteful number, since it uses less digits than its factorization.

31300042120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388077 (or 388073 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 31300042120 its reverse (2124000313), we get a palindrome (33424042433).

The spelling of 31300042120 in words is "thirty-one billion, three hundred million, forty-two thousand, one hundred twenty".