2113123312220 has 12 divisors (see below), whose sum is σ = 4437558955704. Its totient is φ = 845249324880.

The previous prime is 2113123312213. The next prime is 2113123312241. The reversal of 2113123312220 is 222133213112.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52828082786 + ... + 52828082825.

It is an arithmetic number, because the mean of its divisors is an integer number (369796579642).

Almost surely, 2^{2113123312220} is an apocalyptic number.

2113123312220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2113123312220 is an abundant number, since it is smaller than the sum of its proper divisors (2324435643484).

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

2113123312220 is a wasteful number, since it uses less digits than its factorization.

2113123312220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105656165620 (or 105656165618 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 2113123312220 its reverse (222133213112), we get a palindrome (2335256525332).

The spelling of 2113123312220 in words is "two trillion, one hundred thirteen billion, one hundred twenty-three million, three hundred twelve thousand, two hundred twenty".