123102121122 has 48 divisors (see below), whose sum is σ = 269334145080. Its totient is φ = 40632523776.

The previous prime is 123102121081. The next prime is 123102121157. The reversal of 123102121122 is 221121201321.

It can be written as a sum of positive squares in 4 ways, for example, as 119881445121 + 3220676001 = 346239^2 + 56751^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 123102121095 and 123102121104.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3311028 + ... + 3348000.

Almost surely, 2^123102121122 is an apocalyptic number.

123102121122 is an abundant number, since it is smaller than the sum of its proper divisors (146232023958).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123102121122 is a wasteful number, since it uses less digits than its factorization.

123102121122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38787 (or 38784 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 123102121122 its reverse (221121201321), we get a palindrome (344223322443).

The spelling of 123102121122 in words is "one hundred twenty-three billion, one hundred two million, one hundred twenty-one thousand, one hundred twenty-two".