1091123002 has 16 divisors (see below), whose sum is σ = 1734049512. Its totient is φ = 513146880.

The previous prime is 1091122997. The next prime is 1091123009. The reversal of 1091123002 is 2003211901.

It can be written as a sum of positive squares in 4 ways, for example, as 753996681 + 337126321 = 27459^2 + 18361^2 .

It is not an unprimeable number, because it can be changed into a prime (1091123009) 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 7 ways as a sum of consecutive naturals, for example, 49978 + ... + 68410.

Almost surely, 2^1091123002 is an apocalyptic number.

1091123002 is a deficient number, since it is larger than the sum of its proper divisors (642926510).

1091123002 is a wasteful number, since it uses less digits than its factorization.

1091123002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20193.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 1091123002 is about 33032.1510350144. The cubic root of 1091123002 is about 1029.4957792223.

Adding to 1091123002 its reverse (2003211901), we get a palindrome (3094334903).

The spelling of 1091123002 in words is "one billion, ninety-one million, one hundred twenty-three thousand, two".