21221102012000 has 96 divisors (see below), whose sum is σ = 56880270274464. Its totient is φ = 7716764352000.

The previous prime is 21221102011979. The next prime is 21221102012003. The reversal of 21221102012000 is 21020112212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21221102012003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 241104887 + ... + 241192886.

It is an arithmetic number, because the mean of its divisors is an integer number (592502815359).

Almost surely, 2^{21221102012000} is an apocalyptic number.

21221102012000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21221102012000 is an abundant number, since it is smaller than the sum of its proper divisors (35659168262464).

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

21221102012000 is a wasteful number, since it uses less digits than its factorization.

21221102012000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482297809 (or 482297791 counting only the distinct ones).

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

Adding to 21221102012000 its reverse (21020112212), we get a palindrome (21242122124212).

The spelling of 21221102012000 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred two million, twelve thousand".