123112102 has 4 divisors (see below), whose sum is σ = 184668156. Its totient is φ = 61556050.

The previous prime is 123112081. The next prime is 123112103. The reversal of 123112102 is 201211321.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123112103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30778024 + ... + 30778027.

It is an arithmetic number, because the mean of its divisors is an integer number (46167039).

Almost surely, 2^123112102 is an apocalyptic number.

123112102 is a deficient number, since it is larger than the sum of its proper divisors (61556054).

123112102 is an equidigital number, since it uses as much as digits as its factorization.

123112102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61556053.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 123112102 is about 11095.5893038630. The cubic root of 123112102 is about 497.4700226881.

Adding to 123112102 its reverse (201211321), we get a palindrome (324323423).

It can be divided in two parts, 123 and 112102, that added together give a square (112225 = 335²).

The spelling of 123112102 in words is "one hundred twenty-three million, one hundred twelve thousand, one hundred two".