2104400121 has 4 divisors (see below), whose sum is σ = 2805866832. Its totient is φ = 1402933412.

The previous prime is 2104400101. The next prime is 2104400161. The reversal of 2104400121 is 1210044012.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2104400121 - 2⁶ = 2104400057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2104400121.

It is not an unprimeable number, because it can be changed into a prime (2104400101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 350733351 + ... + 350733356.

It is an arithmetic number, because the mean of its divisors is an integer number (701466708).

Almost surely, 2^2104400121 is an apocalyptic number.

It is an amenable number.

2104400121 is a deficient number, since it is larger than the sum of its proper divisors (701466711).

2104400121 is an equidigital number, since it uses as much as digits as its factorization.

2104400121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701466710.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 2104400121 is about 45873.7410835436. The cubic root of 2104400121 is about 1281.4729383834.

Adding to 2104400121 its reverse (1210044012), we get a palindrome (3314444133).

The spelling of 2104400121 in words is "two billion, one hundred four million, four hundred thousand, one hundred twenty-one".