103212112123 has 4 divisors (see below), whose sum is σ = 104214171568. Its totient is φ = 102210052680.

The previous prime is 103212112021. The next prime is 103212112127. The reversal of 103212112123 is 321211212301.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-103212112123 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 103212112123.

It is not an unprimeable number, because it can be changed into a prime (103212112127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 501029568 + ... + 501029773.

It is an arithmetic number, because the mean of its divisors is an integer number (26053542892).

Almost surely, 2^103212112123 is an apocalyptic number.

103212112123 is a deficient number, since it is larger than the sum of its proper divisors (1002059445).

103212112123 is a wasteful number, since it uses less digits than its factorization.

103212112123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1002059444.

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

Adding to 103212112123 its reverse (321211212301), we get a palindrome (424423324424).

The spelling of 103212112123 in words is "one hundred three billion, two hundred twelve million, one hundred twelve thousand, one hundred twenty-three".