123355312102 has 32 divisors (see below), whose sum is σ = 204743635200. Its totient is φ = 55268320800.

The previous prime is 123355312049. The next prime is 123355312103. The reversal of 123355312102 is 201213553321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123355312103) 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, 12161349 + ... + 12171487.

It is an arithmetic number, because the mean of its divisors is an integer number (6398238600).

Almost surely, 2^123355312102 is an apocalyptic number.

123355312102 is a deficient number, since it is larger than the sum of its proper divisors (81388323098).

123355312102 is a wasteful number, since it uses less digits than its factorization.

123355312102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18012.

The product of its (nonzero) digits is 5400, while the sum is 28.

Adding to 123355312102 its reverse (201213553321), we get a palindrome (324568865423).

The spelling of 123355312102 in words is "one hundred twenty-three billion, three hundred fifty-five million, three hundred twelve thousand, one hundred two".