1216522103 has 8 divisors (see below), whose sum is σ = 1247037120. Its totient is φ = 1186200160.

The previous prime is 1216522061. The next prime is 1216522123. The reversal of 1216522103 is 3012256121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1216522103 - 2¹⁸ = 1216259959 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 (1216522123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35468 + ... + 60753.

It is an arithmetic number, because the mean of its divisors is an integer number (155879640).

Almost surely, 2^1216522103 is an apocalyptic number.

1216522103 is a deficient number, since it is larger than the sum of its proper divisors (30515017).

1216522103 is an equidigital number, since it uses as much as digits as its factorization.

1216522103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96537.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1216522103 is about 34878.6769101123. The cubic root of 1216522103 is about 1067.5133986512.

Adding to 1216522103 its reverse (3012256121), we get a palindrome (4228778224).

The spelling of 1216522103 in words is "one billion, two hundred sixteen million, five hundred twenty-two thousand, one hundred three".