1011211133 has 4 divisors (see below), whose sum is σ = 1011586848. Its totient is φ = 1010835420.

The previous prime is 1011211127. The next prime is 1011211163. The reversal of 1011211133 is 3311121101.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1011211133 - 2¹⁸ = 1010948989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011211163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183791 + ... + 189212.

It is an arithmetic number, because the mean of its divisors is an integer number (252896712).

Almost surely, 2^1011211133 is an apocalyptic number.

It is an amenable number.

1011211133 is a deficient number, since it is larger than the sum of its proper divisors (375715).

1011211133 is an equidigital number, since it uses as much as digits as its factorization.

1011211133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375714.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 1011211133 is about 31799.5461131130. The cubic root of 1011211133 is about 1003.7231651710.

Adding to 1011211133 its reverse (3311121101), we get a palindrome (4322332234).

The spelling of 1011211133 in words is "one billion, eleven million, two hundred eleven thousand, one hundred thirty-three".