21112020020190 has 128 divisors (see below), whose sum is σ = 55827202765824. Its totient is φ = 5066954240000.

The previous prime is 21112020020167. The next prime is 21112020020191. The reversal of 21112020020190 is 9102002021112.

It is a super-2 number, since 2×21112020020190² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112020020191) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 555692095 + ... + 555730085.

It is an arithmetic number, because the mean of its divisors is an integer number (436150021608).

Almost surely, 2^{21112020020190} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21112020020190, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27913601382912).

21112020020190 is an abundant number, since it is smaller than the sum of its proper divisors (34715182745634).

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

21112020020190 is a wasteful number, since it uses less digits than its factorization.

21112020020190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54786.

The product of its (nonzero) digits is 144, while the sum is 21.

It can be divided in two parts, 21 and 112020020190, that added together give a palindrome (112020020211).

The spelling of 21112020020190 in words is "twenty-one trillion, one hundred twelve billion, twenty million, twenty thousand, one hundred ninety".