2121220000100 has 36 divisors (see below), whose sum is σ = 4845313057200. Its totient is φ = 803830736160.

The previous prime is 2121220000091. The next prime is 2121220000169. The reversal of 2121220000100 is 10000221212.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 558213890 + ... + 558217689.

Almost surely, 2^{2121220000100} is an apocalyptic number.

2121220000100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121220000100 is an abundant number, since it is smaller than the sum of its proper divisors (2724093057100).

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

2121220000100 is a wasteful number, since it uses less digits than its factorization.

2121220000100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1116431612 (or 1116431605 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 2121220000100 its reverse (10000221212), we get a palindrome (2131220221312).

The spelling of 2121220000100 in words is "two trillion, one hundred twenty-one billion, two hundred twenty million, one hundred", and thus it is an aban number.