11121220131 has 8 divisors (see below), whose sum is σ = 16946621184. Its totient is φ = 6354982920.

The previous prime is 11121220069. The next prime is 11121220139. The reversal of 11121220131 is 13102212111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11121220131 - 2¹⁰ = 11121219107 is a prime.

It is a super-2 number, since 2×11121220131² (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 11121220131.

It is not an unprimeable number, because it can be changed into a prime (11121220139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 264790935 + ... + 264790976.

It is an arithmetic number, because the mean of its divisors is an integer number (2118327648).

Almost surely, 2^11121220131 is an apocalyptic number.

11121220131 is a deficient number, since it is larger than the sum of its proper divisors (5825401053).

11121220131 is an equidigital number, since it uses as much as digits as its factorization.

11121220131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529581921.

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

Adding to 11121220131 its reverse (13102212111), we get a palindrome (24223432242).

The spelling of 11121220131 in words is "eleven billion, one hundred twenty-one million, two hundred twenty thousand, one hundred thirty-one".