1301311111 has 4 divisors (see below), whose sum is σ = 1301443192. Its totient is φ = 1301179032.

The previous prime is 1301311103. The next prime is 1301311117. The reversal of 1301311111 is 1111131031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1111131031 = 479 ⋅2319689.

It is a cyclic number.

It is not a de Polignac number, because 1301311111 - 2³ = 1301311103 is a prime.

It is a super-2 number, since 2×1301311111² = 3386821215224108642, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1301311091 and 1301311100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1301311117) 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, 49956 + ... + 71401.

It is an arithmetic number, because the mean of its divisors is an integer number (325360798).

Almost surely, 2^1301311111 is an apocalyptic number.

1301311111 is a deficient number, since it is larger than the sum of its proper divisors (132081).

1301311111 is a wasteful number, since it uses less digits than its factorization.

1301311111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132080.

The product of its (nonzero) digits is 9, while the sum is 13.

The square root of 1301311111 is about 36073.6900108653. The cubic root of 1301311111 is about 1091.7596667606.

Adding to 1301311111 its reverse (1111131031), we get a palindrome (2412442142).

The spelling of 1301311111 in words is "one billion, three hundred one million, three hundred eleven thousand, one hundred eleven".