2111012100 has 216 divisors, whose sum is σ = 7137355680. Its totient is φ = 520128000.

The previous prime is 2111012087. The next prime is 2111012107. The reversal of 2111012100 is 12101112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (2111012107) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 699595 + ... + 702605.

Almost surely, 2^2111012100 is an apocalyptic number.

2111012100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2111012100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3568677840).

2111012100 is an abundant number, since it is smaller than the sum of its proper divisors (5026343580).

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

2111012100 is a wasteful number, since it uses less digits than its factorization.

2111012100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3091 (or 3081 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 2111012100 is about 45945.7517078565. The cubic root of 2111012100 is about 1282.8136551451.

Adding to 2111012100 its reverse (12101112), we get a palindrome (2123113212).

It can be divided in two parts, 2111012 and 100, that added together give a palindrome (2111112).

The spelling of 2111012100 in words is "two billion, one hundred eleven million, twelve thousand, one hundred".