2111102100 has 54 divisors (see below), whose sum is σ = 6617135070. Its totient is φ = 562960320.

The previous prime is 2111102087. The next prime is 2111102117. The reversal of 2111102100 is 12011112.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 16941456 + 2094160644 = 4116^2 + 45762^2 .

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1171935 + ... + 1173734.

Almost surely, 2^2111102100 is an apocalyptic number.

2111102100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2111102100 is an abundant number, since it is smaller than the sum of its proper divisors (4506032970).

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

2111102100 is a wasteful number, since it uses less digits than its factorization.

2111102100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2345689 (or 2345679 counting only the distinct ones).

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

The square root of 2111102100 is about 45946.7311133230. The cubic root of 2111102100 is about 1282.8318851982.

Adding to 2111102100 its reverse (12011112), we get a palindrome (2123113212).

The spelling of 2111102100 in words is "two billion, one hundred eleven million, one hundred two thousand, one hundred".