1121220099 has 6 divisors (see below), whose sum is σ = 1619540156. Its totient is φ = 747480060.

The previous prime is 1121220097. The next prime is 1121220101. The reversal of 1121220099 is 9900221211.

It is an interprime number because it is at equal distance from previous prime (1121220097) and next prime (1121220101).

It is not a de Polignac number, because 1121220099 - 2¹ = 1121220097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121220097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 62289997 + ... + 62290014.

Almost surely, 2^1121220099 is an apocalyptic number.

1121220099 is a deficient number, since it is larger than the sum of its proper divisors (498320057).

1121220099 is a wasteful number, since it uses less digits than its factorization.

1121220099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124580017 (or 124580014 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 1121220099 is about 33484.6248149804. The cubic root of 1121220099 is about 1038.8757880921.

It can be divided in two parts, 1 and 121220099, that added together give a square (121220100 = 11010²).

The spelling of 1121220099 in words is "one billion, one hundred twenty-one million, two hundred twenty thousand, ninety-nine".