2124514721 has 4 divisors (see below), whose sum is σ = 2428016832. Its totient is φ = 1821012612.

The previous prime is 2124514709. The next prime is 2124514747. The reversal of 2124514721 is 1274154212.

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 2124514721 - 2¹⁸ = 2124252577 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2124514321) 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, 151751045 + ... + 151751058.

It is an arithmetic number, because the mean of its divisors is an integer number (607004208).

Almost surely, 2^2124514721 is an apocalyptic number.

It is an amenable number.

2124514721 is a deficient number, since it is larger than the sum of its proper divisors (303502111).

2124514721 is an equidigital number, since it uses as much as digits as its factorization.

2124514721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303502110.

The product of its digits is 4480, while the sum is 29.

The square root of 2124514721 is about 46092.4583961411. The cubic root of 2124514721 is about 1285.5429220777.

Adding to 2124514721 its reverse (1274154212), we get a palindrome (3398668933).

The spelling of 2124514721 in words is "two billion, one hundred twenty-four million, five hundred fourteen thousand, seven hundred twenty-one".