1198833121 has 4 divisors (see below), whose sum is σ = 1209831700. Its totient is φ = 1187834544.

The previous prime is 1198833079. The next prime is 1198833127. The reversal of 1198833121 is 1213388911.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1067982400 + 130850721 = 32680^2 + 11439^2 .

It is a cyclic number.

It is not a de Polignac number, because 1198833121 - 2¹⁷ = 1198702049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1198833127) 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, 5499126 + ... + 5499343.

It is an arithmetic number, because the mean of its divisors is an integer number (302457925).

Almost surely, 2^1198833121 is an apocalyptic number.

It is an amenable number.

1198833121 is a deficient number, since it is larger than the sum of its proper divisors (10998579).

1198833121 is a wasteful number, since it uses less digits than its factorization.

1198833121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10998578.

The product of its digits is 10368, while the sum is 37.

The square root of 1198833121 is about 34624.1696073711. The cubic root of 1198833121 is about 1062.3140147079.

The spelling of 1198833121 in words is "one billion, one hundred ninety-eight million, eight hundred thirty-three thousand, one hundred twenty-one".