2113212100 has 36 divisors (see below), whose sum is σ = 4593456000. Its totient is φ = 843849760.

The previous prime is 2113212097. The next prime is 2113212109. The reversal of 2113212100 is 12123112.

It is not an unprimeable number, because it can be changed into a prime (2113212109) 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, 42261 + ... + 77539.

It is an arithmetic number, because the mean of its divisors is an integer number (127596000).

Almost surely, 2^2113212100 is an apocalyptic number.

2113212100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2113212100 is an abundant number, since it is smaller than the sum of its proper divisors (2480243900).

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

2113212100 is a wasteful number, since it uses less digits than its factorization.

2113212100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35892 (or 35885 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 2113212100 is about 45969.6867511624. The cubic root of 2113212100 is about 1283.2591302836.

Adding to 2113212100 its reverse (12123112), we get a palindrome (2125335212).

The spelling of 2113212100 in words is "two billion, one hundred thirteen million, two hundred twelve thousand, one hundred".