2113231220 has 48 divisors (see below), whose sum is σ = 4508784000. Its totient is φ = 831815040.

The previous prime is 2113231217. The next prime is 2113231231. The reversal of 2113231220 is 221323112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1005731 + ... + 1007829.

It is an arithmetic number, because the mean of its divisors is an integer number (93933000).

Almost surely, 2^2113231220 is an apocalyptic number.

2113231220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2113231220 is an abundant number, since it is smaller than the sum of its proper divisors (2395552780).

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

2113231220 is a wasteful number, since it uses less digits than its factorization.

2113231220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2888 (or 2886 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 2113231220 is about 45969.8947138233. The cubic root of 2113231220 is about 1283.2630005120.

Adding to 2113231220 its reverse (221323112), we get a palindrome (2334554332).

The spelling of 2113231220 in words is "two billion, one hundred thirteen million, two hundred thirty-one thousand, two hundred twenty".