1091123022 has 32 divisors (see below), whose sum is σ = 2436001920. Its totient is φ = 322953120.

The previous prime is 1091123017. The next prime is 1091123029. The reversal of 1091123022 is 2203211901.

It is a self number, because there is not a number n which added to its sum of digits gives 1091123022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091123029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 189397 + ... + 195072.

It is an arithmetic number, because the mean of its divisors is an integer number (76125060).

Almost surely, 2^1091123022 is an apocalyptic number.

1091123022 is an abundant number, since it is smaller than the sum of its proper divisors (1344878898).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1091123022 is a wasteful number, since it uses less digits than its factorization.

1091123022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384528.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 1091123022 is about 33032.1513377497. The cubic root of 1091123022 is about 1029.4957855125.

Adding to 1091123022 its reverse (2203211901), we get a palindrome (3294334923).

It can be divided in two parts, 10911 and 23022, that added together give a palindrome (33933).

The spelling of 1091123022 in words is "one billion, ninety-one million, one hundred twenty-three thousand, twenty-two".