31231120321330 has 32 divisors (see below), whose sum is σ = 56472524362800. Its totient is φ = 12435475341312.

The previous prime is 31231120321273. The next prime is 31231120321351. The reversal of 31231120321330 is 3312302113213.

It can be written as a sum of positive squares in 8 ways, for example, as 13837708088649 + 17393412232681 = 3719907^2 + 4170541^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31231120321295 and 31231120321304.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6835026 + ... + 10448914.

Almost surely, 2^{31231120321330} is an apocalyptic number.

31231120321330 is a deficient number, since it is larger than the sum of its proper divisors (25241404041470).

31231120321330 is a wasteful number, since it uses less digits than its factorization.

31231120321330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3617838.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 31231120321330 its reverse (3312302113213), we get a palindrome (34543422434543).

The spelling of 31231120321330 in words is "thirty-one trillion, two hundred thirty-one billion, one hundred twenty million, three hundred twenty-one thousand, three hundred thirty".