2121000100212 has 96 divisors (see below), whose sum is σ = 5673074176000. Its totient is φ = 604172742912.

The previous prime is 2121000100169. The next prime is 2121000100223. The reversal of 2121000100212 is 2120010001212.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 51568968 + ... + 51610080.

Almost surely, 2^{2121000100212} is an apocalyptic number.

It is an amenable number.

2121000100212 is an abundant number, since it is smaller than the sum of its proper divisors (3552074075788).

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

2121000100212 is a wasteful number, since it uses less digits than its factorization.

2121000100212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42965 (or 42963 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 2121000100212 its reverse (2120010001212), we get a palindrome (4241010101424).

The spelling of 2121000100212 in words is "two trillion, one hundred twenty-one billion, one hundred thousand, two hundred twelve".