1121311091 has 16 divisors (see below), whose sum is σ = 1166356800. Its totient is φ = 1077242880.

The previous prime is 1121311073. The next prime is 1121311097. The reversal of 1121311091 is 1901131211.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1121311091 - 2⁶ = 1121311027 is a prime.

It is a super-2 number, since 2×1121311091² = 2514677125599220562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121311097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 800810 + ... + 802208.

It is an arithmetic number, because the mean of its divisors is an integer number (72897300).

Almost surely, 2^1121311091 is an apocalyptic number.

1121311091 is a deficient number, since it is larger than the sum of its proper divisors (45045709).

1121311091 is a wasteful number, since it uses less digits than its factorization.

1121311091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1726.

The product of its (nonzero) digits is 54, while the sum is 20.

The square root of 1121311091 is about 33485.9835005633. The cubic root of 1121311091 is about 1038.9038904628.

The spelling of 1121311091 in words is "one billion, one hundred twenty-one million, three hundred eleven thousand, ninety-one".