31300123122 has 12 divisors (see below), whose sum is σ = 67816933470. Its totient is φ = 10433374368.

The previous prime is 31300123067. The next prime is 31300123147. The reversal of 31300123122 is 22132100313.

It can be written as a sum of positive squares in only one way, i.e., 29100606921 + 2199516201 = 170589^2 + 46899^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1738895729 = 31300123122 / (3 + 1 + 3 + 0 + 0 + 1 + 2 + 3 + 1 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 31300123095 and 31300123104.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 869447847 + ... + 869447882.

Almost surely, 2^31300123122 is an apocalyptic number.

31300123122 is an abundant number, since it is smaller than the sum of its proper divisors (36516810348).

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

31300123122 is a wasteful number, since it uses less digits than its factorization.

31300123122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1738895737 (or 1738895734 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 31300123122 its reverse (22132100313), we get a palindrome (53432223435).

The spelling of 31300123122 in words is "thirty-one billion, three hundred million, one hundred twenty-three thousand, one hundred twenty-two".