2112121200100 has 36 divisors (see below), whose sum is σ = 4586273723584. Its totient is φ = 844300882080.

The previous prime is 2112121200043. The next prime is 2112121200173. The reversal of 2112121200100 is 10021212112.

It is a super-2 number, since 2×2112121200100² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6689904 + ... + 6998503.

Almost surely, 2^{2112121200100} is an apocalyptic number.

2112121200100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2112121200100 is an abundant number, since it is smaller than the sum of its proper divisors (2474152523484).

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

2112121200100 is a wasteful number, since it uses less digits than its factorization.

2112121200100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13689964 (or 13689957 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2112121200100 its reverse (10021212112), we get a palindrome (2122142412212).

The spelling of 2112121200100 in words is "two trillion, one hundred twelve billion, one hundred twenty-one million, two hundred thousand, one hundred".