123102111121 has 16 divisors (see below), whose sum is σ = 136206499968. Its totient is φ = 110317110400.

The previous prime is 123102111053. The next prime is 123102111127. The reversal of 123102111121 is 121111201321.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 123102111121 - 2¹⁷ = 123101980049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123102111095 and 123102111104.

It is not an unprimeable number, because it can be changed into a prime (123102111127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8750325 + ... + 8764381.

It is an arithmetic number, because the mean of its divisors is an integer number (8512906248).

Almost surely, 2^123102111121 is an apocalyptic number.

123102111121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

123102111121 is a deficient number, since it is larger than the sum of its proper divisors (13104388847).

123102111121 is a wasteful number, since it uses less digits than its factorization.

123102111121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25352.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 123102111121 its reverse (121111201321), we get a palindrome (244213312442).

The spelling of 123102111121 in words is "one hundred twenty-three billion, one hundred two million, one hundred eleven thousand, one hundred twenty-one".