211213133 has 4 divisors (see below), whose sum is σ = 211519488. Its totient is φ = 210906780.

The previous prime is 211213103. The next prime is 211213147. The reversal of 211213133 is 331312112.

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 211213133 - 2⁶ = 211213069 is a prime.

It is a super-2 number, since 2×211213133² = 89221975103351378, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211213103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152141 + ... + 153522.

It is an arithmetic number, because the mean of its divisors is an integer number (52879872).

Almost surely, 2^211213133 is an apocalyptic number.

It is an amenable number.

211213133 is a deficient number, since it is larger than the sum of its proper divisors (306355).

211213133 is an equidigital number, since it uses as much as digits as its factorization.

211213133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306354.

The product of its digits is 108, while the sum is 17.

The square root of 211213133 is about 14533.1735350542. The cubic root of 211213133 is about 595.5345646652.

Adding to 211213133 its reverse (331312112), we get a palindrome (542525245).

The spelling of 211213133 in words is "two hundred eleven million, two hundred thirteen thousand, one hundred thirty-three".