1211522103 has 20 divisors (see below), whose sum is σ = 1974333768. Its totient is φ = 734255280.

The previous prime is 1211522087. The next prime is 1211522173. The reversal of 1211522103 is 3012251121.

It is not a de Polignac number, because 1211522103 - 2⁴ = 1211522087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211522173) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 678976 + ... + 680757.

Almost surely, 2^1211522103 is an apocalyptic number.

1211522103 is a deficient number, since it is larger than the sum of its proper divisors (762811665).

1211522103 is a wasteful number, since it uses less digits than its factorization.

1211522103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1359756 (or 1359747 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 1211522103 is about 34806.9260780092. The cubic root of 1211522103 is about 1066.0488694747.

Adding to 1211522103 its reverse (3012251121), we get a palindrome (4223773224).

The spelling of 1211522103 in words is "one billion, two hundred eleven million, five hundred twenty-two thousand, one hundred three".