11145261331 has 4 divisors (see below), whose sum is σ = 11279541672. Its totient is φ = 11010980992.

The previous prime is 11145261313. The next prime is 11145261341. The reversal of 11145261331 is 13316254111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13316254111 = 107 ⋅124450973.

It is a cyclic number.

It is not a de Polignac number, because 11145261331 - 2⁵ = 11145261299 is a prime.

It is a super-2 number, since 2×11145261331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11145261331.

It is not an unprimeable number, because it can be changed into a prime (11145261341) 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, 67140046 + ... + 67140211.

It is an arithmetic number, because the mean of its divisors is an integer number (2819885418).

Almost surely, 2^11145261331 is an apocalyptic number.

11145261331 is a deficient number, since it is larger than the sum of its proper divisors (134280341).

11145261331 is an equidigital number, since it uses as much as digits as its factorization.

11145261331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134280340.

The product of its digits is 2160, while the sum is 28.

The spelling of 11145261331 in words is "eleven billion, one hundred forty-five million, two hundred sixty-one thousand, three hundred thirty-one".