31323300021320 has 64 divisors (see below), whose sum is σ = 71041089450240. Its totient is φ = 12429509875200.

The previous prime is 31323300021319. The next prime is 31323300021323. The reversal of 31323300021320 is 2312000332313.

It is a super-2 number, since 2×31323300021320² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31323300021323) 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, 3675146 + ... + 8726585.

It is an arithmetic number, because the mean of its divisors is an integer number (1110017022660).

Almost surely, 2^{31323300021320} is an apocalyptic number.

It is an amenable number.

31323300021320 is an abundant number, since it is smaller than the sum of its proper divisors (39717789428920).

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

31323300021320 is a wasteful number, since it uses less digits than its factorization.

31323300021320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12402246 (or 12402242 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 31323300021320 its reverse (2312000332313), we get a palindrome (33635300353633).

The spelling of 31323300021320 in words is "thirty-one trillion, three hundred twenty-three billion, three hundred million, twenty-one thousand, three hundred twenty".