21221112011000 has 96 divisors (see below), whose sum is σ = 54582103452240. Its totient is φ = 7716767960000.

The previous prime is 21221112010999. The next prime is 21221112011063. The reversal of 21221112011000 is 11021112212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87569546 + ... + 87811545.

Almost surely, 2^{21221112011000} is an apocalyptic number.

21221112011000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21221112011000 is an abundant number, since it is smaller than the sum of its proper divisors (33360991441240).

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

21221112011000 is a wasteful number, since it uses less digits than its factorization.

21221112011000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175381134 (or 175381109 counting only the distinct ones).

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

Adding to 21221112011000 its reverse (11021112212), we get a palindrome (21232133123212).

The spelling of 21221112011000 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred twelve million, eleven thousand".