2112121100 has 18 divisors (see below), whose sum is σ = 4583303004. Its totient is φ = 844848400.

The previous prime is 2112121097. The next prime is 2112121133. The reversal of 2112121100 is 11212112.

It is a super-2 number, since 2×2112121100² = 8922111082130420000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10560506 + ... + 10560705.

Almost surely, 2^2112121100 is an apocalyptic number.

2112121100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2112121100 is an abundant number, since it is smaller than the sum of its proper divisors (2471181904).

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

2112121100 is a wasteful number, since it uses less digits than its factorization.

2112121100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21121225 (or 21121218 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 2112121100 is about 45957.8187036765. The cubic root of 2112121100 is about 1283.0382537776.

Adding to 2112121100 its reverse (11212112), we get a palindrome (2123333212).

The spelling of 2112121100 in words is "two billion, one hundred twelve million, one hundred twenty-one thousand, one hundred".