1011121099 has 4 divisors (see below), whose sum is σ = 1013643000. Its totient is φ = 1008599200.

The previous prime is 1011121093. The next prime is 1011121103. The reversal of 1011121099 is 9901211101.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1011121099 - 2³ = 1011121091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011121091) 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 3 ways as a sum of consecutive naturals, for example, 1260349 + ... + 1261150.

It is an arithmetic number, because the mean of its divisors is an integer number (253410750).

Almost surely, 2^1011121099 is an apocalyptic number.

1011121099 is a deficient number, since it is larger than the sum of its proper divisors (2521901).

1011121099 is an equidigital number, since it uses as much as digits as its factorization.

1011121099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2521900.

The product of its (nonzero) digits is 162, while the sum is 25.

The square root of 1011121099 is about 31798.1304324641. The cubic root of 1011121099 is about 1003.6933751859.

The spelling of 1011121099 in words is "one billion, eleven million, one hundred twenty-one thousand, ninety-nine".