31300220120 has 128 divisors (see below), whose sum is σ = 78866403840. Its totient is φ = 11101777920.

The previous prime is 31300220117. The next prime is 31300220131. The reversal of 31300220120 is 2102200313.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31300220095 and 31300220104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2201354 + ... + 2215526.

It is an arithmetic number, because the mean of its divisors is an integer number (616143780).

Almost surely, 2^31300220120 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31300220120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39433201920).

31300220120 is an abundant number, since it is smaller than the sum of its proper divisors (47566183720).

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

31300220120 is a wasteful number, since it uses less digits than its factorization.

31300220120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14365 (or 14361 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 31300220120 its reverse (2102200313), we get a palindrome (33402420433).

The spelling of 31300220120 in words is "thirty-one billion, three hundred million, two hundred twenty thousand, one hundred twenty".