1121311099 has 4 divisors (see below), whose sum is σ = 1121399064. Its totient is φ = 1121223136.

The previous prime is 1121311097. The next prime is 1121311133. The reversal of 1121311099 is 9901131211.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1121311099 - 2¹ = 1121311097 is a prime.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20782 + ... + 51715.

It is an arithmetic number, because the mean of its divisors is an integer number (280349766).

Almost surely, 2^1121311099 is an apocalyptic number.

1121311099 is a deficient number, since it is larger than the sum of its proper divisors (87965).

1121311099 is an equidigital number, since it uses as much as digits as its factorization.

1121311099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87964.

The product of its (nonzero) digits is 486, while the sum is 28.

The square root of 1121311099 is about 33485.9836200163. The cubic root of 1121311099 is about 1038.9038929335.

The spelling of 1121311099 in words is "one billion, one hundred twenty-one million, three hundred eleven thousand, ninety-nine".