21112122201000 has 128 divisors (see below), whose sum is σ = 66204187695360. Its totient is φ = 5601320928000.

The previous prime is 21112122200987. The next prime is 21112122201017. The reversal of 21112122201000 is 10222121112.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17270356 + ... + 18452355.

It is an arithmetic number, because the mean of its divisors is an integer number (517220216370).

Almost surely, 2^{21112122201000} is an apocalyptic number.

21112122201000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21112122201000 is an abundant number, since it is smaller than the sum of its proper divisors (45092065494360).

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

21112122201000 is a wasteful number, since it uses less digits than its factorization.

21112122201000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35722932 (or 35722918 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21112122201000 its reverse (10222121112), we get a palindrome (21122344322112).

The spelling of 21112122201000 in words is "twenty-one trillion, one hundred twelve billion, one hundred twenty-two million, two hundred one thousand".