1121321091 has 16 divisors (see below), whose sum is σ = 1635649920. Its totient is φ = 677656320.

The previous prime is 1121321051. The next prime is 1121321101. The reversal of 1121321091 is 1901231211.

It is a happy number.

It is not a de Polignac number, because 1121321091 - 2¹⁵ = 1121288323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1121321011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36481 + ... + 59778.

It is an arithmetic number, because the mean of its divisors is an integer number (102228120).

Almost surely, 2^1121321091 is an apocalyptic number.

1121321091 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1121321091 is a deficient number, since it is larger than the sum of its proper divisors (514328829).

1121321091 is a wasteful number, since it uses less digits than its factorization.

1121321091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96626.

The product of its (nonzero) digits is 108, while the sum is 21.

The square root of 1121321091 is about 33486.1328164361. The cubic root of 1121321091 is about 1038.9069788142.

The spelling of 1121321091 in words is "one billion, one hundred twenty-one million, three hundred twenty-one thousand, ninety-one".