1311013201 has 4 divisors (see below), whose sum is σ = 1311193152. Its totient is φ = 1310833252.

The previous prime is 1311013199. The next prime is 1311013211. The reversal of 1311013201 is 1023101131.

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 an emirpimes, since its reverse is a distinct semiprime: 1023101131 = 13 ⋅78700087.

It is a cyclic number.

It is not a de Polignac number, because 1311013201 - 2¹ = 1311013199 is a prime.

It is a super-2 number, since 2×1311013201² = 3437511226392532802, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311013211) 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, 78565 + ... + 93778.

It is an arithmetic number, because the mean of its divisors is an integer number (327798288).

Almost surely, 2^1311013201 is an apocalyptic number.

It is an amenable number.

1311013201 is a deficient number, since it is larger than the sum of its proper divisors (179951).

1311013201 is an equidigital number, since it uses as much as digits as its factorization.

1311013201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179950.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 1311013201 is about 36207.9162753120. The cubic root of 1311013201 is about 1094.4662024352.

Adding to 1311013201 its reverse (1023101131), we get a palindrome (2334114332).

The spelling of 1311013201 in words is "one billion, three hundred eleven million, thirteen thousand, two hundred one".