102131102123 has 4 divisors (see below), whose sum is σ = 106571584848. Its totient is φ = 97690619400.

The previous prime is 102131102083. The next prime is 102131102149. The reversal of 102131102123 is 321201131201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321201131201 = 83 ⋅3869893147.

It is a cyclic number.

It is not a de Polignac number, because 102131102123 - 2⁸ = 102131101867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102131102153) 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, 2220241328 + ... + 2220241373.

It is an arithmetic number, because the mean of its divisors is an integer number (26642896212).

Almost surely, 2^102131102123 is an apocalyptic number.

102131102123 is a deficient number, since it is larger than the sum of its proper divisors (4440482725).

102131102123 is an equidigital number, since it uses as much as digits as its factorization.

102131102123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4440482724.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 102131102123 its reverse (321201131201), we get a palindrome (423332233324).

The spelling of 102131102123 in words is "one hundred two billion, one hundred thirty-one million, one hundred two thousand, one hundred twenty-three".