1101311213 has 4 divisors (see below), whose sum is σ = 1101445788. Its totient is φ = 1101176640.

The previous prime is 1101311207. The next prime is 1101311249. The reversal of 1101311213 is 3121131011.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3121131011 = 42709 ⋅73079.

It can be written as a sum of positive squares in 2 ways, for example, as 680322889 + 420988324 = 26083^2 + 20518^2 .

It is a cyclic number.

It is not a de Polignac number, because 1101311213 - 2⁶ = 1101311149 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 (1101311513) 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, 54158 + ... + 71663.

It is an arithmetic number, because the mean of its divisors is an integer number (275361447).

Almost surely, 2^1101311213 is an apocalyptic number.

It is an amenable number.

1101311213 is a deficient number, since it is larger than the sum of its proper divisors (134575).

1101311213 is an equidigital number, since it uses as much as digits as its factorization.

1101311213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134574.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 1101311213 is about 33186.0092960874. The cubic root of 1101311213 is about 1032.6901159568.

Adding to 1101311213 its reverse (3121131011), we get a palindrome (4222442224).

The spelling of 1101311213 in words is "one billion, one hundred one million, three hundred eleven thousand, two hundred thirteen".