51201010123 has 2 divisors, whose sum is σ = 51201010124. Its totient is φ = 51201010122.

The previous prime is 51201010121. The next prime is 51201010141. The reversal of 51201010123 is 32101010215.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51201010123 - 2¹ = 51201010121 is a prime.

Together with 51201010121, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 51201010097 and 51201010106.

It is not a weakly prime, because it can be changed into another prime (51201010121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25600505061 + 25600505062.

It is an arithmetic number, because the mean of its divisors is an integer number (25600505062).

Almost surely, 2^51201010123 is an apocalyptic number.

51201010123 is a deficient number, since it is larger than the sum of its proper divisors (1).

51201010123 is an equidigital number, since it uses as much as digits as its factorization.

51201010123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60, while the sum is 16.

Adding to 51201010123 its reverse (32101010215), we get a palindrome (83302020338).

The spelling of 51201010123 in words is "fifty-one billion, two hundred one million, ten thousand, one hundred twenty-three".