1121001099 has 16 divisors (see below), whose sum is σ = 1570770432. Its totient is φ = 710222688.

The previous prime is 1121001047. The next prime is 1121001107. The reversal of 1121001099 is 9901001211.

It is not a de Polignac number, because 1121001099 - 2¹¹ = 1120999051 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1121001799) 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, 112659 + ... + 122204.

It is an arithmetic number, because the mean of its divisors is an integer number (98173152).

Almost surely, 2^1121001099 is an apocalyptic number.

1121001099 is a deficient number, since it is larger than the sum of its proper divisors (449769333).

1121001099 is a wasteful number, since it uses less digits than its factorization.

1121001099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234946.

The product of its (nonzero) digits is 162, while the sum is 24.

The square root of 1121001099 is about 33481.3544976902. The cubic root of 1121001099 is about 1038.8081449320.

The spelling of 1121001099 in words is "one billion, one hundred twenty-one million, one thousand, ninety-nine".