31103012301320 has 32 divisors (see below), whose sum is σ = 70144148430720. Its totient is φ = 12412339008960.

The previous prime is 31103012301311. The next prime is 31103012301377. The reversal of 31103012301320 is 2310321030113.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 31103012301292 and 31103012301301.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 902042282 + ... + 902076761.

It is an arithmetic number, because the mean of its divisors is an integer number (2192004638460).

Almost surely, 2^{31103012301320} is an apocalyptic number.

It is an amenable number.

31103012301320 is an abundant number, since it is smaller than the sum of its proper divisors (39041136129400).

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

31103012301320 is a wasteful number, since it uses less digits than its factorization.

31103012301320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1804119485 (or 1804119481 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 31103012301320 its reverse (2310321030113), we get a palindrome (33413333331433).

The spelling of 31103012301320 in words is "thirty-one trillion, one hundred three billion, twelve million, three hundred one thousand, three hundred twenty".