2121120111200 has 72 divisors (see below), whose sum is σ = 5356742615280. Its totient is φ = 819191206400.

The previous prime is 2121120111139. The next prime is 2121120111221. The reversal of 2121120111200 is 21110211212.

It is a super-2 number, since 2×2121120111200² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45690596 + ... + 45736995.

It is an arithmetic number, because the mean of its divisors is an integer number (74399202990).

Almost surely, 2^{2121120111200} is an apocalyptic number.

2121120111200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121120111200 is an abundant number, since it is smaller than the sum of its proper divisors (3235622504080).

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

2121120111200 is a wasteful number, since it uses less digits than its factorization.

2121120111200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91427640 (or 91427627 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 2121120111200 its reverse (21110211212), we get a palindrome (2142230322412).

The spelling of 2121120111200 in words is "two trillion, one hundred twenty-one billion, one hundred twenty million, one hundred eleven thousand, two hundred".