103215123 has 12 divisors (see below), whose sum is σ = 162642168. Its totient is φ = 62554560.

The previous prime is 103215121. The next prime is 103215127. The reversal of 103215123 is 321512301.

It is not a de Polignac number, because 103215123 - 2¹ = 103215121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 103215096 and 103215105.

It is not an unprimeable number, because it can be changed into a prime (103215121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 521190 + ... + 521387.

It is an arithmetic number, because the mean of its divisors is an integer number (13553514).

Almost surely, 2^103215123 is an apocalyptic number.

103215123 is a deficient number, since it is larger than the sum of its proper divisors (59427045).

103215123 is a wasteful number, since it uses less digits than its factorization.

103215123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1042594 (or 1042591 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 103215123 is about 10159.4843865228. The cubic root of 103215123 is about 469.0809306861.

Adding to 103215123 its reverse (321512301), we get a palindrome (424727424).

The spelling of 103215123 in words is "one hundred three million, two hundred fifteen thousand, one hundred twenty-three".