2113231020 has 48 divisors (see below), whose sum is σ = 6061372128. Its totient is φ = 549783040.

The previous prime is 2113231009. The next prime is 2113231027. The reversal of 2113231020 is 201323112.

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

It is not an unprimeable number, because it can be changed into a prime (2113231027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 427059 + ... + 431978.

It is an arithmetic number, because the mean of its divisors is an integer number (126278586).

Almost surely, 2^2113231020 is an apocalyptic number.

2113231020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2113231020 is an abundant number, since it is smaller than the sum of its proper divisors (3948141108).

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

2113231020 is a wasteful number, since it uses less digits than its factorization.

2113231020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 859090 (or 859088 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 2113231020 is about 45969.8925384865. The cubic root of 2113231020 is about 1283.2629600285.

Adding to 2113231020 its reverse (201323112), we get a palindrome (2314554132).

The spelling of 2113231020 in words is "two billion, one hundred thirteen million, two hundred thirty-one thousand, twenty".