21120221102000 has 80 divisors (see below), whose sum is σ = 51071279220000. Its totient is φ = 8447660883200.

The previous prime is 21120221101999. The next prime is 21120221102021. The reversal of 21120221102000 is 20112202112.

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, 40841051 + ... + 41354949.

It is an arithmetic number, because the mean of its divisors is an integer number (638390990250).

Almost surely, 2^{21120221102000} is an apocalyptic number.

21120221102000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21120221102000 is an abundant number, since it is smaller than the sum of its proper divisors (29951058118000).

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

21120221102000 is a wasteful number, since it uses less digits than its factorization.

21120221102000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534471 (or 534455 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21120221102000 its reverse (20112202112), we get a palindrome (21140333304112).

The spelling of 21120221102000 in words is "twenty-one trillion, one hundred twenty billion, two hundred twenty-one million, one hundred two thousand".