2111043220400 has 180 divisors, whose sum is σ = 5349217836480. Its totient is φ = 799780876800.

The previous prime is 2111043220397. The next prime is 2111043220421. The reversal of 2111043220400 is 40223401112.

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

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 27353066 + ... + 27430134.

Almost surely, 2^{2111043220400} is an apocalyptic number.

2111043220400 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 2111043220400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2674608918240).

2111043220400 is an abundant number, since it is smaller than the sum of its proper divisors (3238174616080).

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

2111043220400 is a wasteful number, since it uses less digits than its factorization.

2111043220400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77212 (or 77154 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 2111043220400 its reverse (40223401112), we get a palindrome (2151266621512).

The spelling of 2111043220400 in words is "two trillion, one hundred eleven billion, forty-three million, two hundred twenty thousand, four hundred".