11022221131 has 4 divisors (see below), whose sum is σ = 11023026264. Its totient is φ = 11021416000.

The previous prime is 11022221087. The next prime is 11022221137. The reversal of 11022221131 is 13112222011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13112222011 = 7 ⋅1873174573.

It is a cyclic number.

It is not a de Polignac number, because 11022221131 - 2⁹ = 11022220619 is a prime.

It is a super-2 number, since 2×11022221131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11022221137) 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, 381670 + ... + 409531.

It is an arithmetic number, because the mean of its divisors is an integer number (2755756566).

Almost surely, 2^11022221131 is an apocalyptic number.

11022221131 is a deficient number, since it is larger than the sum of its proper divisors (805133).

11022221131 is an equidigital number, since it uses as much as digits as its factorization.

11022221131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805132.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 11022221131 its reverse (13112222011), we get a palindrome (24134443142).

The spelling of 11022221131 in words is "eleven billion, twenty-two million, two hundred twenty-one thousand, one hundred thirty-one".