1311420111 has 4 divisors (see below), whose sum is σ = 1748560152. Its totient is φ = 874280072.

The previous prime is 1311420101. The next prime is 1311420133. The reversal of 1311420111 is 1110241131.

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 1311420111 - 2⁵ = 1311420079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311420101) 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, 218570016 + ... + 218570021.

It is an arithmetic number, because the mean of its divisors is an integer number (437140038).

Almost surely, 2^1311420111 is an apocalyptic number.

1311420111 is a deficient number, since it is larger than the sum of its proper divisors (437140041).

1311420111 is an equidigital number, since it uses as much as digits as its factorization.

1311420111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437140040.

The product of its (nonzero) digits is 24, while the sum is 15.

The square root of 1311420111 is about 36213.5349144488. The cubic root of 1311420111 is about 1094.5794235618.

Adding to 1311420111 its reverse (1110241131), we get a palindrome (2421661242).

The spelling of 1311420111 in words is "one billion, three hundred eleven million, four hundred twenty thousand, one hundred eleven".