31321231221330 has 80 divisors (see below), whose sum is σ = 84352781582784. Its totient is φ = 8339091536160.

The previous prime is 31321231221317. The next prime is 31321231221443. The reversal of 31321231221330 is 3312213212313.

31321231221330 is a `hidden beast` number, since 3 + 1 + 3 + 2 + 12 + 312 + 2 + 1 + 330 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 31321231221294 and 31321231221303.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 30129292 + ... + 31151511.

Almost surely, 2^{31321231221330} is an apocalyptic number.

31321231221330 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31321231221330 is an abundant number, since it is smaller than the sum of its proper divisors (53031550361454).

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

31321231221330 is a wasteful number, since it uses less digits than its factorization.

31321231221330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61281453 (or 61281444 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

Adding to 31321231221330 its reverse (3312213212313), we get a palindrome (34633444433643).

The spelling of 31321231221330 in words is "thirty-one trillion, three hundred twenty-one billion, two hundred thirty-one million, two hundred twenty-one thousand, three hundred thirty".