1100201121 has 12 divisors (see below), whose sum is σ = 1682660772. Its totient is φ = 690322176.

The previous prime is 1100201117. The next prime is 1100201147. The reversal of 1100201121 is 1211020011.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 797441121 + 302760000 = 28239^2 + 17400^2 .

It is not a de Polignac number, because 1100201121 - 2² = 1100201117 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (1100211121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3595276 + ... + 3595581.

It is an arithmetic number, because the mean of its divisors is an integer number (140221731).

Almost surely, 2^1100201121 is an apocalyptic number.

It is an amenable number.

1100201121 is a deficient number, since it is larger than the sum of its proper divisors (582459651).

1100201121 is a wasteful number, since it uses less digits than its factorization.

1100201121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7190880 (or 7190877 counting only the distinct ones).

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

The square root of 1100201121 is about 33169.2797781321. The cubic root of 1100201121 is about 1032.3430247161.

Adding to 1100201121 its reverse (1211020011), we get a palindrome (2311221132).

The spelling of 1100201121 in words is "one billion, one hundred million, two hundred one thousand, one hundred twenty-one".