1211232413 has 4 divisors (see below), whose sum is σ = 1211313600. Its totient is φ = 1211151228.

The previous prime is 1211232389. The next prime is 1211232427. The reversal of 1211232413 is 3142321121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1211232413 - 2¹⁶ = 1211166877 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 (1211232443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11045 + ... + 50442.

It is an arithmetic number, because the mean of its divisors is an integer number (302828400).

Almost surely, 2^1211232413 is an apocalyptic number.

It is an amenable number.

1211232413 is a deficient number, since it is larger than the sum of its proper divisors (81187).

1211232413 is an equidigital number, since it uses as much as digits as its factorization.

1211232413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81186.

The product of its digits is 288, while the sum is 20.

The square root of 1211232413 is about 34802.7644447966. The cubic root of 1211232413 is about 1065.9638941878.

Adding to 1211232413 its reverse (3142321121), we get a palindrome (4353553534).

The spelling of 1211232413 in words is "one billion, two hundred eleven million, two hundred thirty-two thousand, four hundred thirteen".