11213120031 has 4 divisors (see below), whose sum is σ = 14950826712. Its totient is φ = 7475413352.

The previous prime is 11213120021. The next prime is 11213120033. The reversal of 11213120031 is 13002131211.

It is a happy number.

11213120031 is digitally balanced in base 2, 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 an emirpimes, since its reverse is a distinct semiprime: 13002131211 = 3 ⋅4334043737.

It is a cyclic number.

It is not a de Polignac number, because 11213120031 - 2¹⁰ = 11213119007 is a prime.

It is a super-2 number, since 2×11213120031² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11213120033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1868853336 + ... + 1868853341.

It is an arithmetic number, because the mean of its divisors is an integer number (3737706678).

Almost surely, 2^11213120031 is an apocalyptic number.

11213120031 is a deficient number, since it is larger than the sum of its proper divisors (3737706681).

11213120031 is an equidigital number, since it uses as much as digits as its factorization.

11213120031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3737706680.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 11213120031 its reverse (13002131211), we get a palindrome (24215251242).

The spelling of 11213120031 in words is "eleven billion, two hundred thirteen million, one hundred twenty thousand, thirty-one".