2221124121400 has 24 divisors (see below), whose sum is σ = 5164113582720. Its totient is φ = 888449648480.

The previous prime is 2221124121361. The next prime is 2221124121409. The reversal of 2221124121400 is 41214211222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221124121409) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5552810104 + ... + 5552810503.

It is an arithmetic number, because the mean of its divisors is an integer number (215171399280).

Almost surely, 2^{2221124121400} is an apocalyptic number.

2221124121400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2221124121400 is an abundant number, since it is smaller than the sum of its proper divisors (2942989461320).

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

2221124121400 is a wasteful number, since it uses less digits than its factorization.

2221124121400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11105620623 (or 11105620614 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 2221124121400 its reverse (41214211222), we get a palindrome (2262338332622).

The spelling of 2221124121400 in words is "two trillion, two hundred twenty-one billion, one hundred twenty-four million, one hundred twenty-one thousand, four hundred".