31301113203220 has 24 divisors (see below), whose sum is σ = 75122671688064. Its totient is φ = 10731810241056.

The previous prime is 31301113203209. The next prime is 31301113203233. The reversal of 31301113203220 is 2230231110313.

It is a junction number, because it is equal to n+sod(n) for n = 31301113203191 and 31301113203200.

It is a congruent number.

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, 111789689872 + ... + 111789690151.

It is an arithmetic number, because the mean of its divisors is an integer number (3130111320336).

Almost surely, 2^{31301113203220} is an apocalyptic number.

It is an amenable number.

31301113203220 is an abundant number, since it is smaller than the sum of its proper divisors (43821558484844).

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

31301113203220 is a wasteful number, since it uses less digits than its factorization.

31301113203220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223579380039 (or 223579380037 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 31301113203220 its reverse (2230231110313), we get a palindrome (33531344313533).

The spelling of 31301113203220 in words is "thirty-one trillion, three hundred one billion, one hundred thirteen million, two hundred three thousand, two hundred twenty".