1100121201 has 6 divisors (see below), whose sum is σ = 1589063970. Its totient is φ = 733414128.

The previous prime is 1100121193. The next prime is 1100121229. The reversal of 1100121201 is 1021210011.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 672624225 + 427496976 = 25935^2 + 20676^2 .

It is not a de Polignac number, because 1100121201 - 2³ = 1100121193 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 122235689 = 1100121201 / (1 + 1 + 0 + 0 + 1 + 2 + 1 + 2 + 0 + 1).

It is not an unprimeable number, because it can be changed into a prime (1100121271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 61117836 + ... + 61117853.

It is an arithmetic number, because the mean of its divisors is an integer number (264843995).

Almost surely, 2^1100121201 is an apocalyptic number.

It is an amenable number.

1100121201 is a deficient number, since it is larger than the sum of its proper divisors (488942769).

1100121201 is a wasteful number, since it uses less digits than its factorization.

1100121201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122235695 (or 122235692 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 1100121201 is about 33168.0750270497. The cubic root of 1100121201 is about 1032.3180272101.

Adding to 1100121201 its reverse (1021210011), we get a palindrome (2121331212).

The spelling of 1100121201 in words is "one billion, one hundred million, one hundred twenty-one thousand, two hundred one".