51300042121 has 4 divisors (see below), whose sum is σ = 51349417600. Its totient is φ = 51250666644.

The previous prime is 51300042113. The next prime is 51300042133. The reversal of 51300042121 is 12124000315.

51300042121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 51300042121 - 2³ = 51300042113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51300043121) 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, 24686181 + ... + 24688258.

It is an arithmetic number, because the mean of its divisors is an integer number (12837354400).

Almost surely, 2^51300042121 is an apocalyptic number.

It is an amenable number.

51300042121 is a deficient number, since it is larger than the sum of its proper divisors (49375479).

51300042121 is a wasteful number, since it uses less digits than its factorization.

51300042121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49375478.

The product of its (nonzero) digits is 240, while the sum is 19.

Adding to 51300042121 its reverse (12124000315), we get a palindrome (63424042436).

The spelling of 51300042121 in words is "fifty-one billion, three hundred million, forty-two thousand, one hundred twenty-one".