31231121332330 has 8 divisors (see below), whose sum is σ = 56216018398212. Its totient is φ = 12492448532928.

The previous prime is 31231121332303. The next prime is 31231121332339. The reversal of 31231121332330 is 3323312113213.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 29086358153329 + 2144763179001 = 5393177^2 + 1464501^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (31231121332339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1561556066607 + ... + 1561556066626.

Almost surely, 2^{31231121332330} is an apocalyptic number.

31231121332330 is a deficient number, since it is larger than the sum of its proper divisors (24984897065882).

31231121332330 is a wasteful number, since it uses less digits than its factorization.

31231121332330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3123112133240.

The product of its (nonzero) digits is 5832, while the sum is 28.

Adding to 31231121332330 its reverse (3323312113213), we get a palindrome (34554433445543).

The spelling of 31231121332330 in words is "thirty-one trillion, two hundred thirty-one billion, one hundred twenty-one million, three hundred thirty-two thousand, three hundred thirty".