11121122031 has 4 divisors (see below), whose sum is σ = 14828162712. Its totient is φ = 7414081352.

The previous prime is 11121122027. The next prime is 11121122083. The reversal of 11121122031 is 13022112111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11121122031 - 2² = 11121122027 is a prime.

It is a super-2 number, since 2×11121122031² (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 11121122031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121122011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1853520336 + ... + 1853520341.

It is an arithmetic number, because the mean of its divisors is an integer number (3707040678).

Almost surely, 2^11121122031 is an apocalyptic number.

11121122031 is a deficient number, since it is larger than the sum of its proper divisors (3707040681).

11121122031 is an equidigital number, since it uses as much as digits as its factorization.

11121122031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3707040680.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 11121122031 its reverse (13022112111), we get a palindrome (24143234142).

The spelling of 11121122031 in words is "eleven billion, one hundred twenty-one million, one hundred twenty-two thousand, thirty-one".