21112020221000 has 128 divisors (see below), whose sum is σ = 52538349427200. Its totient is φ = 7917866035200.

The previous prime is 21112020220909. The next prime is 21112020221003. The reversal of 21112020221000 is 12202021112.

It is not an unprimeable number, because it can be changed into a prime (21112020221003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3884624 + ... + 7570623.

It is an arithmetic number, because the mean of its divisors is an integer number (410455854900).

Almost surely, 2^{21112020221000} is an apocalyptic number.

21112020221000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21112020221000 is an abundant number, since it is smaller than the sum of its proper divisors (31426329206200).

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

21112020221000 is a wasteful number, since it uses less digits than its factorization.

21112020221000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11455384 (or 11455370 counting only the distinct ones).

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

Adding to 21112020221000 its reverse (12202021112), we get a palindrome (21124222242112).

The spelling of 21112020221000 in words is "twenty-one trillion, one hundred twelve billion, twenty million, two hundred twenty-one thousand".