1211513036 has 12 divisors (see below), whose sum is σ = 2231734680. Its totient is φ = 573874560.

The previous prime is 1211513033. The next prime is 1211513053. The reversal of 1211513036 is 6303151121.

It is not an unprimeable number, because it can be changed into a prime (1211513033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7970405 + ... + 7970556.

It is an arithmetic number, because the mean of its divisors is an integer number (185977890).

Almost surely, 2^1211513036 is an apocalyptic number.

It is an amenable number.

1211513036 is a deficient number, since it is larger than the sum of its proper divisors (1020221644).

1211513036 is a wasteful number, since it uses less digits than its factorization.

1211513036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15940984 (or 15940982 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 1211513036 is about 34806.7958306995. The cubic root of 1211513036 is about 1066.0462100407.

Adding to 1211513036 its reverse (6303151121), we get a palindrome (7514664157).

The spelling of 1211513036 in words is "one billion, two hundred eleven million, five hundred thirteen thousand, thirty-six".