211222133 has 4 divisors (see below), whose sum is σ = 220405728. Its totient is φ = 202038540.

The previous prime is 211222111. The next prime is 211222147. The reversal of 211222133 is 331222112.

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 211222133 - 2¹² = 211218037 is a prime.

It is a super-2 number, since 2×211222133² = 89229578938139378, 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 (211228133) 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, 4591763 + ... + 4591808.

It is an arithmetic number, because the mean of its divisors is an integer number (55101432).

Almost surely, 2^211222133 is an apocalyptic number.

211222133 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

211222133 is a deficient number, since it is larger than the sum of its proper divisors (9183595).

211222133 is an equidigital number, since it uses as much as digits as its factorization.

211222133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9183594.

The product of its digits is 144, while the sum is 17.

The square root of 211222133 is about 14533.4831681879. The cubic root of 211222133 is about 595.5430233168.

Adding to 211222133 its reverse (331222112), we get a palindrome (542444245).

The spelling of 211222133 in words is "two hundred eleven million, two hundred twenty-two thousand, one hundred thirty-three".