2124004121 has 4 divisors (see below), whose sum is σ = 2153919744. Its totient is φ = 2094088500.

The previous prime is 2124004117. The next prime is 2124004133. The reversal of 2124004121 is 1214004212.

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 2124004121 - 2² = 2124004117 is a prime.

It is a super-2 number, since 2×2124004121² = 9022787012049965282, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2124004121.

It is not an unprimeable number, because it can be changed into a prime (2124004111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14957705 + ... + 14957846.

It is an arithmetic number, because the mean of its divisors is an integer number (538479936).

Almost surely, 2^2124004121 is an apocalyptic number.

It is an amenable number.

2124004121 is a deficient number, since it is larger than the sum of its proper divisors (29915623).

2124004121 is an equidigital number, since it uses as much as digits as its factorization.

2124004121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29915622.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 2124004121 is about 46086.9191962318. The cubic root of 2124004121 is about 1285.4399258809.

Adding to 2124004121 its reverse (1214004212), we get a palindrome (3338008333).

Subtracting from 2124004121 its reverse (1214004212), we obtain a palindrome (909999909).

The spelling of 2124004121 in words is "two billion, one hundred twenty-four million, four thousand, one hundred twenty-one".