1311121101 has 4 divisors (see below), whose sum is σ = 1748161472. Its totient is φ = 874080732.

The previous prime is 1311121067. The next prime is 1311121111. The reversal of 1311121101 is 1011211131.

1311121101 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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.

It is not a de Polignac number, because 1311121101 - 2²⁷ = 1176903373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311121111) 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, 218520181 + ... + 218520186.

It is an arithmetic number, because the mean of its divisors is an integer number (437040368).

Almost surely, 2^1311121101 is an apocalyptic number.

It is an amenable number.

1311121101 is a deficient number, since it is larger than the sum of its proper divisors (437040371).

1311121101 is an equidigital number, since it uses as much as digits as its factorization.

1311121101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437040370.

The product of its (nonzero) digits is 6, while the sum is 12.

The square root of 1311121101 is about 36209.4062503102. The cubic root of 1311121101 is about 1094.4962274733.

Adding to 1311121101 its reverse (1011211131), we get a palindrome (2322332232).

The spelling of 1311121101 in words is "one billion, three hundred eleven million, one hundred twenty-one thousand, one hundred one".