1312011213 has 8 divisors (see below), whose sum is σ = 1749564576. Its totient is φ = 874566000.

The previous prime is 1312011203. The next prime is 1312011221. The reversal of 1312011213 is 3121102131.

It is a happy number.

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

It is not a de Polignac number, because 1312011213 - 2²⁰ = 1310962637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1312011192 and 1312011201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312011203) 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, 7618 + ... + 51788.

It is an arithmetic number, because the mean of its divisors is an integer number (218695572).

Almost surely, 2^1312011213 is an apocalyptic number.

It is an amenable number.

1312011213 is a deficient number, since it is larger than the sum of its proper divisors (437553363).

1312011213 is an equidigital number, since it uses as much as digits as its factorization.

1312011213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54075.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1312011213 is about 36221.6953358067. The cubic root of 1312011213 is about 1094.7438536825.

Adding to 1312011213 its reverse (3121102131), we get a palindrome (4433113344).

The spelling of 1312011213 in words is "one billion, three hundred twelve million, eleven thousand, two hundred thirteen".