123123121102 has 4 divisors (see below), whose sum is σ = 184684681656. Its totient is φ = 61561560550.

The previous prime is 123123121097. The next prime is 123123121127. The reversal of 123123121102 is 201121321321.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 123123121102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30780780274 + ... + 30780780277.

It is an arithmetic number, because the mean of its divisors is an integer number (46171170414).

Almost surely, 2^123123121102 is an apocalyptic number.

123123121102 is a deficient number, since it is larger than the sum of its proper divisors (61561560554).

123123121102 is an equidigital number, since it uses as much as digits as its factorization.

123123121102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61561560553.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 123123121102 its reverse (201121321321), we get a palindrome (324244442423).

The spelling of 123123121102 in words is "one hundred twenty-three billion, one hundred twenty-three million, one hundred twenty-one thousand, one hundred two".