1301111111 has 4 divisors (see below), whose sum is σ = 1302298272. Its totient is φ = 1299923952.

The previous prime is 1301111101. The next prime is 1301111113. The reversal of 1301111111 is 1111111031.

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

It is a cyclic number.

It is not a de Polignac number, because 1301111111 - 2¹⁰ = 1301110087 is a prime.

It is a Duffinian number.

1301111111 is a modest number, since divided by 111111 gives 1301 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 1301111092 and 1301111101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1301111113) 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, 591935 + ... + 594128.

It is an arithmetic number, because the mean of its divisors is an integer number (325574568).

Almost surely, 2^1301111111 is an apocalyptic number.

1301111111 is a deficient number, since it is larger than the sum of its proper divisors (1187161).

1301111111 is a wasteful number, since it uses less digits than its factorization.

1301111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1187160.

The product of its (nonzero) digits is 3, while the sum is 11.

The square root of 1301111111 is about 36070.9178009099. The cubic root of 1301111111 is about 1091.7037326290.

Adding to 1301111111 its reverse (1111111031), we get a palindrome (2412222142).

The spelling of 1301111111 in words is "one billion, three hundred one million, one hundred eleven thousand, one hundred eleven".