21112011201000 has 256 divisors, whose sum is σ = 66627808416000. Its totient is φ = 5565089587200.

The previous prime is 21112011200933. The next prime is 21112011201011. The reversal of 21112011201000 is 10211021112.

It is a super-2 number, since 2×21112011201000² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1243410511 + ... + 1243427489.

It is an arithmetic number, because the mean of its divisors is an integer number (260264876625).

Almost surely, 2^{21112011201000} is an apocalyptic number.

21112011201000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21112011201000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33313904208000).

21112011201000 is an abundant number, since it is smaller than the sum of its proper divisors (45515797215000).

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

21112011201000 is a wasteful number, since it uses less digits than its factorization.

21112011201000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21749 (or 21735 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 21112011201000 its reverse (10211021112), we get a palindrome (21122222222112).

The spelling of 21112011201000 in words is "twenty-one trillion, one hundred twelve billion, eleven million, two hundred one thousand".