21121022210000 has 100 divisors (see below), whose sum is σ = 51393077076000. Its totient is φ = 8405953776000.

The previous prime is 21121022209993. The next prime is 21121022210023. The reversal of 21121022210000 is 1222012112.

It is a tau number, because it is divible by the number of its divisors (100).

It is a congruent number.

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, 3316790 + ... + 7296789.

It is an arithmetic number, because the mean of its divisors is an integer number (513930770760).

Almost surely, 2^{21121022210000} is an apocalyptic number.

21121022210000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21121022210000 is an abundant number, since it is smaller than the sum of its proper divisors (30272054866000).

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

21121022210000 is a wasteful number, since it uses less digits than its factorization.

21121022210000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10613806 (or 10613785 counting only the distinct ones).

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

Adding to 21121022210000 its reverse (1222012112), we get a palindrome (21122244222112).

The spelling of 21121022210000 in words is "twenty-one trillion, one hundred twenty-one billion, twenty-two million, two hundred ten thousand".