1100121211 has 16 divisors (see below), whose sum is σ = 1354272768. Its totient is φ = 872863200.

The previous prime is 1100121193. The next prime is 1100121229. The reversal of 1100121211 is 1121210011.

It is an interprime number because it is at equal distance from previous prime (1100121193) and next prime (1100121229).

It is a cyclic number.

It is not a de Polignac number, because 1100121211 - 2⁵ = 1100121179 is a prime.

It is a Duffinian number.

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 (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 105220 + ... + 115201.

It is an arithmetic number, because the mean of its divisors is an integer number (84642048).

Almost surely, 2^1100121211 is an apocalyptic number.

1100121211 is a deficient number, since it is larger than the sum of its proper divisors (254151557).

1100121211 is a wasteful number, since it uses less digits than its factorization.

1100121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220482.

The product of its (nonzero) digits is 4, while the sum is 10.

The square root of 1100121211 is about 33168.0751777971. The cubic root of 1100121211 is about 1032.3180303380.

Adding to 1100121211 its reverse (1121210011), we get a palindrome (2221331222).

The spelling of 1100121211 in words is "one billion, one hundred million, one hundred twenty-one thousand, two hundred eleven".