1121091881 has 32 divisors (see below), whose sum is σ = 1414361088. Its totient is φ = 865013760.

The previous prime is 1121091791. The next prime is 1121091899. The reversal of 1121091881 is 1881901211.

It is not a de Polignac number, because 1121091881 - 2¹⁴ = 1121075497 is a prime.

It is a super-2 number, since 2×1121091881² = 2513694011288236322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1121091281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 920585 + ... + 921801.

It is an arithmetic number, because the mean of its divisors is an integer number (44198784).

Almost surely, 2^1121091881 is an apocalyptic number.

It is an amenable number.

1121091881 is a deficient number, since it is larger than the sum of its proper divisors (293269207).

1121091881 is a wasteful number, since it uses less digits than its factorization.

1121091881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1481.

The product of its (nonzero) digits is 1152, while the sum is 32.

The square root of 1121091881 is about 33482.7101800317. The cubic root of 1121091881 is about 1038.8361860985.

The spelling of 1121091881 in words is "one billion, one hundred twenty-one million, ninety-one thousand, eight hundred eighty-one".