51202221121 has 8 divisors (see below), whose sum is σ = 53433547200. Its totient is φ = 48971323632.

The previous prime is 51202221089. The next prime is 51202221127. The reversal of 51202221121 is 12112220215.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51202221121 - 2⁵ = 51202221089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51202221127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150166 + ... + 353488.

It is an arithmetic number, because the mean of its divisors is an integer number (6679193400).

Almost surely, 2^51202221121 is an apocalyptic number.

It is an amenable number.

51202221121 is a deficient number, since it is larger than the sum of its proper divisors (2231326079).

51202221121 is a wasteful number, since it uses less digits than its factorization.

51202221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214295.

The product of its (nonzero) digits is 160, while the sum is 19.

Adding to 51202221121 its reverse (12112220215), we get a palindrome (63314441336).

The spelling of 51202221121 in words is "fifty-one billion, two hundred two million, two hundred twenty-one thousand, one hundred twenty-one".