51460121321 has 4 divisors (see below), whose sum is σ = 58811567232. Its totient is φ = 44108675412.

The previous prime is 51460121309. The next prime is 51460121333. The reversal of 51460121321 is 12312106415.

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 an interprime number because it is at equal distance from previous prime (51460121309) and next prime (51460121333).

It is a cyclic number.

It is not a de Polignac number, because 51460121321 - 2⁶ = 51460121257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51460121381) 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, 3675722945 + ... + 3675722958.

It is an arithmetic number, because the mean of its divisors is an integer number (14702891808).

Almost surely, 2^51460121321 is an apocalyptic number.

It is an amenable number.

51460121321 is a deficient number, since it is larger than the sum of its proper divisors (7351445911).

51460121321 is an equidigital number, since it uses as much as digits as its factorization.

51460121321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7351445910.

The product of its (nonzero) digits is 1440, while the sum is 26.

Adding to 51460121321 its reverse (12312106415), we get a palindrome (63772227736).

The spelling of 51460121321 in words is "fifty-one billion, four hundred sixty million, one hundred twenty-one thousand, three hundred twenty-one".