2113031111220 has 36 divisors (see below), whose sum is σ = 6409527704580. Its totient is φ = 563474962944.

The previous prime is 2113031111173. The next prime is 2113031111221. The reversal of 2113031111220 is 221111303112.

2113031111220 is a `hidden beast` number, since 2 + 1 + 130 + 311 + 1 + 1 + 220 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1617510850596 + 495520260624 = 1271814^2 + 703932^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 2113031111193 and 2113031111202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2113031111221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5869530685 + ... + 5869531044.

Almost surely, 2^{2113031111220} is an apocalyptic number.

2113031111220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2113031111220 is an abundant number, since it is smaller than the sum of its proper divisors (4296496593360).

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

2113031111220 is a wasteful number, since it uses less digits than its factorization.

2113031111220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11739061744 (or 11739061739 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 2113031111220 its reverse (221111303112), we get a palindrome (2334142414332).

The spelling of 2113031111220 in words is "two trillion, one hundred thirteen billion, thirty-one million, one hundred eleven thousand, two hundred twenty".