1301213213 has 4 divisors (see below), whose sum is σ = 1302691068. Its totient is φ = 1299735360.

The previous prime is 1301213191. The next prime is 1301213227. The reversal of 1301213213 is 3123121031.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 423454084 + 877759129 = 20578^2 + 29627^2 .

It is a cyclic number.

It is not a de Polignac number, because 1301213213 - 2⁶ = 1301213149 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1301213191 and 1301213200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1301213413) 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, 737606 + ... + 739367.

It is an arithmetic number, because the mean of its divisors is an integer number (325672767).

Almost surely, 2^1301213213 is an apocalyptic number.

It is an amenable number.

1301213213 is a deficient number, since it is larger than the sum of its proper divisors (1477855).

1301213213 is an equidigital number, since it uses as much as digits as its factorization.

1301213213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1477854.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1301213213 is about 36072.3330684335. Note that the first 3 decimals coincide. The cubic root of 1301213213 is about 1091.7322882786.

Adding to 1301213213 its reverse (3123121031), we get a palindrome (4424334244).

The spelling of 1301213213 in words is "one billion, three hundred one million, two hundred thirteen thousand, two hundred thirteen".