2021144200400 has 240 divisors, whose sum is σ = 5644854956160. Its totient is φ = 689206425600.

The previous prime is 2021144200363. The next prime is 2021144200441. The reversal of 2021144200400 is 40024411202.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3177035 + ... + 3759765.

It is an arithmetic number, because the mean of its divisors is an integer number (23520228984).

Almost surely, 2^{2021144200400} is an apocalyptic number.

2021144200400 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 2021144200400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2822427478080).

2021144200400 is an abundant number, since it is smaller than the sum of its proper divisors (3623710755760).

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

2021144200400 is a wasteful number, since it uses less digits than its factorization.

2021144200400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582814 (or 582803 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 2021144200400 its reverse (40024411202), we get a palindrome (2061168611602).

The spelling of 2021144200400 in words is "two trillion, twenty-one billion, one hundred forty-four million, two hundred thousand, four hundred".