211133023331 has 4 divisors (see below), whose sum is σ = 211142202600. Its totient is φ = 211123844064.

The previous prime is 211133023327. The next prime is 211133023333. The reversal of 211133023331 is 133320331112.

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

It is a cyclic number.

It is not a de Polignac number, because 211133023331 - 2² = 211133023327 is a prime.

It is a super-2 number, since 2×211133023331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211133023297 and 211133023306.

It is not an unprimeable number, because it can be changed into a prime (211133023333) 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 3 ways as a sum of consecutive naturals, for example, 4555046 + ... + 4601163.

It is an arithmetic number, because the mean of its divisors is an integer number (52785550650).

Almost surely, 2^211133023331 is an apocalyptic number.

211133023331 is a deficient number, since it is larger than the sum of its proper divisors (9179269).

211133023331 is an equidigital number, since it uses as much as digits as its factorization.

211133023331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9179268.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 211133023331 its reverse (133320331112), we get a palindrome (344453354443).

The spelling of 211133023331 in words is "two hundred eleven billion, one hundred thirty-three million, twenty-three thousand, three hundred thirty-one".