21102201221000 has 64 divisors (see below), whose sum is σ = 49380474648960. Its totient is φ = 8440654200000.

The previous prime is 21102201220957. The next prime is 21102201221027. The reversal of 21102201221000 is 12210220112.

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, 39888215 + ... + 40413785.

It is an arithmetic number, because the mean of its divisors is an integer number (771569916390).

Almost surely, 2^{21102201221000} is an apocalyptic number.

21102201221000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21102201221000 is an abundant number, since it is smaller than the sum of its proper divisors (28278273427960).

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

21102201221000 is a wasteful number, since it uses less digits than its factorization.

21102201221000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565743 (or 565729 counting only the distinct ones).

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

Adding to 21102201221000 its reverse (12210220112), we get a palindrome (21114411441112).

It can be divided in two parts, 21102 and 201221000, that added together give a palindrome (201242102).

The spelling of 21102201221000 in words is "twenty-one trillion, one hundred two billion, two hundred one million, two hundred twenty-one thousand".