51201452122 has 4 divisors (see below), whose sum is σ = 76802178186. Its totient is φ = 25600726060.

The previous prime is 51201452117. The next prime is 51201452161. The reversal of 51201452122 is 22125410215.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22125410215 = 5 ⋅4425082043.

It can be written as a sum of positive squares in only one way, i.e., 42214222521 + 8987229601 = 205461^2 + 94801^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12800363029 + ... + 12800363032.

Almost surely, 2^51201452122 is an apocalyptic number.

51201452122 is a deficient number, since it is larger than the sum of its proper divisors (25600726064).

51201452122 is a wasteful number, since it uses less digits than its factorization.

51201452122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25600726063.

The product of its (nonzero) digits is 1600, while the sum is 25.

Adding to 51201452122 its reverse (22125410215), we get a palindrome (73326862337).

The spelling of 51201452122 in words is "fifty-one billion, two hundred one million, four hundred fifty-two thousand, one hundred twenty-two".