31301112220 has 48 divisors (see below), whose sum is σ = 75166112448. Its totient is φ = 10725603840.

The previous prime is 31301112191. The next prime is 31301112223. The reversal of 31301112220 is 2221110313.

It is a junction number, because it is equal to n+sod(n) for n = 31301112194 and 31301112203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31301112223) 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, 181650 + ... + 309190.

It is an arithmetic number, because the mean of its divisors is an integer number (1565960676).

Almost surely, 2^31301112220 is an apocalyptic number.

It is an amenable number.

31301112220 is an abundant number, since it is smaller than the sum of its proper divisors (43865000228).

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

31301112220 is a wasteful number, since it uses less digits than its factorization.

31301112220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129310 (or 129308 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 31301112220 its reverse (2221110313), we get a palindrome (33522222533).

The spelling of 31301112220 in words is "thirty-one billion, three hundred one million, one hundred twelve thousand, two hundred twenty".