2121423053200 has 120 divisors (see below), whose sum is σ = 5572902748896. Its totient is φ = 769644288000.

The previous prime is 2121423053159. The next prime is 2121423053213. The reversal of 2121423053200 is 23503241212.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1348455 + ... + 2461945.

Almost surely, 2^{2121423053200} is an apocalyptic number.

2121423053200 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 2121423053200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2786451374448).

2121423053200 is an abundant number, since it is smaller than the sum of its proper divisors (3451479695696).

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

2121423053200 is a wasteful number, since it uses less digits than its factorization.

2121423053200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1113953 (or 1113942 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 2121423053200 its reverse (23503241212), we get a palindrome (2144926294412).

The spelling of 2121423053200 in words is "two trillion, one hundred twenty-one billion, four hundred twenty-three million, fifty-three thousand, two hundred".