2121110020000 has 120 divisors (see below), whose sum is σ = 5339605604256. Its totient is φ = 828712416000.

The previous prime is 2121110019961. The next prime is 2121110020013. The reversal of 2121110020000 is 200111212.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 373204 + ... + 2093203.

Almost surely, 2^{2121110020000} is an apocalyptic number.

2121110020000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121110020000 is an abundant number, since it is smaller than the sum of its proper divisors (3218495584256).

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

2121110020000 is an equidigital number, since it uses as much as digits as its factorization.

2121110020000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2466480 (or 2466457 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 2121110020000 its reverse (200111212), we get a palindrome (2121310131212).

The spelling of 2121110020000 in words is "two trillion, one hundred twenty-one billion, one hundred ten million, twenty thousand".