2521214321 has 2 divisors, whose sum is σ = 2521214322. Its totient is φ = 2521214320.

The previous prime is 2521214273. The next prime is 2521214323. The reversal of 2521214321 is 1234121252.

2521214321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1371665296 + 1149549025 = 37036^2 + 33905^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2521214321 is a prime.

Together with 2521214323, it forms a pair of twin primes.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (2521214323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1260607160 + 1260607161.

It is an arithmetic number, because the mean of its divisors is an integer number (1260607161).

Almost surely, 2^2521214321 is an apocalyptic number.

It is an amenable number.

2521214321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2521214321 is an equidigital number, since it uses as much as digits as its factorization.

2521214321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960, while the sum is 23.

The square root of 2521214321 is about 50211.6950620072. The cubic root of 2521214321 is about 1361.0369688299.

Adding to 2521214321 its reverse (1234121252), we get a palindrome (3755335573).

The spelling of 2521214321 in words is "two billion, five hundred twenty-one million, two hundred fourteen thousand, three hundred twenty-one".