51204042501111 has 12 divisors (see below), whose sum is σ = 73962662747688. Its totient is φ = 34135443092304.

The previous prime is 51204042501109. The next prime is 51204042501149. The reversal of 51204042501111 is 11110524040215.

51204042501111 is a `hidden beast` number, since 5 + 1 + 2 + 0 + 4 + 0 + 42 + 501 + 111 = 666.

It is not a de Polignac number, because 51204042501111 - 2¹ = 51204042501109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51204042501191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48215700 + ... + 49266233.

It is an arithmetic number, because the mean of its divisors is an integer number (6163555228974).

Almost surely, 2^{51204042501111} is an apocalyptic number.

51204042501111 is a deficient number, since it is larger than the sum of its proper divisors (22758620246577).

51204042501111 is a wasteful number, since it uses less digits than its factorization.

51204042501111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97540302 (or 97540299 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 27.

Adding to 51204042501111 its reverse (11110524040215), we get a palindrome (62314566541326).

The spelling of 51204042501111 in words is "fifty-one trillion, two hundred four billion, forty-two million, five hundred one thousand, one hundred eleven".