31121302330 has 32 divisors (see below), whose sum is σ = 56805138000. Its totient is φ = 12273795072.

The previous prime is 31121302327. The next prime is 31121302337. The reversal of 31121302330 is 3320312113.

It can be written as a sum of positive squares in 8 ways, for example, as 15416450569 + 15704851761 = 124163^2 + 125319^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31121302298 and 31121302307.

It is not an unprimeable number, because it can be changed into a prime (31121302337) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2950506 + ... + 2961034.

Almost surely, 2^31121302330 is an apocalyptic number.

31121302330 is a deficient number, since it is larger than the sum of its proper divisors (25683835670).

31121302330 is a wasteful number, since it uses less digits than its factorization.

31121302330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14658.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 31121302330 its reverse (3320312113), we get a palindrome (34441614443).

The spelling of 31121302330 in words is "thirty-one billion, one hundred twenty-one million, three hundred two thousand, three hundred thirty".