51101002123 has 4 divisors (see below), whose sum is σ = 53322784848. Its totient is φ = 48879219400.

The previous prime is 51101002111. The next prime is 51101002153. The reversal of 51101002123 is 32120010115.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32120010115 = 5 ⋅6424002023.

It is a cyclic number.

It is not a de Polignac number, because 51101002123 - 2⁵ = 51101002091 is a prime.

It is a super-2 number, since 2×51101002123² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51101002097 and 51101002106.

It is not an unprimeable number, because it can be changed into a prime (51101002153) 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, 1110891328 + ... + 1110891373.

It is an arithmetic number, because the mean of its divisors is an integer number (13330696212).

Almost surely, 2^51101002123 is an apocalyptic number.

51101002123 is a deficient number, since it is larger than the sum of its proper divisors (2221782725).

51101002123 is a wasteful number, since it uses less digits than its factorization.

51101002123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2221782724.

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

Adding to 51101002123 its reverse (32120010115), we get a palindrome (83221012238).

The spelling of 51101002123 in words is "fifty-one billion, one hundred one million, two thousand, one hundred twenty-three".