51202310111321 has 4 divisors (see below), whose sum is σ = 51283454818944. Its totient is φ = 51121165403700.

The previous prime is 51202310111299. The next prime is 51202310111371. The reversal of 51202310111321 is 12311101320215.

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 a de Polignac number, because none of the positive numbers 2^k-51202310111321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51202310111371) 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, 40572352865 + ... + 40572354126.

It is an arithmetic number, because the mean of its divisors is an integer number (12820863704736).

Almost surely, 2^{51202310111321} is an apocalyptic number.

It is an amenable number.

51202310111321 is a deficient number, since it is larger than the sum of its proper divisors (81144707623).

51202310111321 is an equidigital number, since it uses as much as digits as its factorization.

51202310111321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81144707622.

The product of its (nonzero) digits is 360, while the sum is 23.

Adding to 51202310111321 its reverse (12311101320215), we get a palindrome (63513411431536).

The spelling of 51202310111321 in words is "fifty-one trillion, two hundred two billion, three hundred ten million, one hundred eleven thousand, three hundred twenty-one".