1215102103 has 4 divisors (see below), whose sum is σ = 1215527040. Its totient is φ = 1214677168.

The previous prime is 1215102073. The next prime is 1215102131. The reversal of 1215102103 is 3012015121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3012015121 = 9791 ⋅307631.

It is a cyclic number.

It is not a de Polignac number, because 1215102103 - 2²¹ = 1213004951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215102403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208150 + ... + 213907.

It is an arithmetic number, because the mean of its divisors is an integer number (303881760).

Almost surely, 2^1215102103 is an apocalyptic number.

1215102103 is a deficient number, since it is larger than the sum of its proper divisors (424937).

1215102103 is an equidigital number, since it uses as much as digits as its factorization.

1215102103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424936.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 1215102103 is about 34858.3146896117. The cubic root of 1215102103 is about 1067.0978810017.

Adding to 1215102103 its reverse (3012015121), we get a palindrome (4227117224).

The spelling of 1215102103 in words is "one billion, two hundred fifteen million, one hundred two thousand, one hundred three".