11011131121031 has 4 divisors (see below), whose sum is σ = 11028255742392. Its totient is φ = 10994006499672.

The previous prime is 11011131120973. The next prime is 11011131121049. The reversal of 11011131121031 is 13012113111011.

It is a happy number.

11011131121031 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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11011131121031 is a prime.

It is a super-2 number, since 2×11011131121031² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11011131121051) 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, 8562309716 + ... + 8562311001.

It is an arithmetic number, because the mean of its divisors is an integer number (2757063935598).

Almost surely, 2^{11011131121031} is an apocalyptic number.

11011131121031 is a deficient number, since it is larger than the sum of its proper divisors (17124621361).

11011131121031 is an equidigital number, since it uses as much as digits as its factorization.

11011131121031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17124621360.

The product of its (nonzero) digits is 18, while the sum is 17.

Adding to 11011131121031 its reverse (13012113111011), we get a palindrome (24023244232042).

The spelling of 11011131121031 in words is "eleven trillion, eleven billion, one hundred thirty-one million, one hundred twenty-one thousand, thirty-one".