2121222001100 has 18 divisors (see below), whose sum is σ = 4603051742604. Its totient is φ = 848488800400.

The previous prime is 2121222001091. The next prime is 2121222001181. The reversal of 2121222001100 is 11002221212.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10606109906 + ... + 10606110105.

Almost surely, 2^{2121222001100} is an apocalyptic number.

2121222001100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121222001100 is an abundant number, since it is smaller than the sum of its proper divisors (2481829741504).

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

2121222001100 is a wasteful number, since it uses less digits than its factorization.

2121222001100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21212220025 (or 21212220018 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2121222001100 its reverse (11002221212), we get a palindrome (2132224222312).

The spelling of 2121222001100 in words is "two trillion, one hundred twenty-one billion, two hundred twenty-two million, one thousand, one hundred".