31113011000220 has 192 divisors, whose sum is σ = 93555539675136. Its totient is φ = 7697582530560.

The previous prime is 31113011000173. The next prime is 31113011000299. The reversal of 31113011000220 is 2200011031113.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 31113011000220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 137414505 + ... + 137640735.

It is an arithmetic number, because the mean of its divisors is an integer number (487268435808).

Almost surely, 2^{31113011000220} is an apocalyptic number.

31113011000220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31113011000220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46777769837568).

31113011000220 is an abundant number, since it is smaller than the sum of its proper divisors (62442528674916).

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

31113011000220 is a wasteful number, since it uses less digits than its factorization.

31113011000220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228180 (or 228178 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 31113011000220 its reverse (2200011031113), we get a palindrome (33313022031333).

The spelling of 31113011000220 in words is "thirty-one trillion, one hundred thirteen billion, eleven million, two hundred twenty", and thus it is an aban number.