11201123031 has 32 divisors (see below), whose sum is σ = 17204920320. Its totient is φ = 6349595616.

The previous prime is 11201123023. The next prime is 11201123099. The reversal of 11201123031 is 13032110211.

It is a happy number.

It is not a de Polignac number, because 11201123031 - 2³ = 11201123023 is a prime.

It is a super-2 number, since 2×11201123031² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11201123031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11201125031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1915410 + ... + 1921248.

It is an arithmetic number, because the mean of its divisors is an integer number (537653760).

Almost surely, 2^11201123031 is an apocalyptic number.

11201123031 is a deficient number, since it is larger than the sum of its proper divisors (6003797289).

11201123031 is a wasteful number, since it uses less digits than its factorization.

11201123031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6563.

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

Adding to 11201123031 its reverse (13032110211), we get a palindrome (24233233242).

The spelling of 11201123031 in words is "eleven billion, two hundred one million, one hundred twenty-three thousand, thirty-one".