1211301313 has 4 divisors (see below), whose sum is σ = 1219323328. Its totient is φ = 1203279300.

The previous prime is 1211301269. The next prime is 1211301317. The reversal of 1211301313 is 3131031121.

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.

It is a cyclic number.

It is not a de Polignac number, because 1211301313 - 2²⁵ = 1177746881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211301317) 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, 4010781 + ... + 4011082.

It is an arithmetic number, because the mean of its divisors is an integer number (304830832).

Almost surely, 2^1211301313 is an apocalyptic number.

It is an amenable number.

1211301313 is a deficient number, since it is larger than the sum of its proper divisors (8022015).

1211301313 is an equidigital number, since it uses as much as digits as its factorization.

1211301313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8022014.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 1211301313 is about 34803.7542946160. The cubic root of 1211301313 is about 1065.9841059762.

Adding to 1211301313 its reverse (3131031121), we get a palindrome (4342332434).

The spelling of 1211301313 in words is "one billion, two hundred eleven million, three hundred one thousand, three hundred thirteen".