2121100222000 has 80 divisors (see below), whose sum is σ = 5129387662464. Its totient is φ = 848346240000.

The previous prime is 2121100221983. The next prime is 2121100222013. The reversal of 2121100222000 is 2220011212.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19688280 + ... + 19795720.

Almost surely, 2^{2121100222000} is an apocalyptic number.

2121100222000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121100222000 is an abundant number, since it is smaller than the sum of its proper divisors (3008287440464).

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

2121100222000 is a wasteful number, since it uses less digits than its factorization.

2121100222000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117335 (or 117319 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 2121100222000 its reverse (2220011212), we get a palindrome (2123320233212).

The spelling of 2121100222000 in words is "two trillion, one hundred twenty-one billion, one hundred million, two hundred twenty-two thousand".