213222011 has 4 divisors (see below), whose sum is σ = 213346224. Its totient is φ = 213097800.

The previous prime is 213221963. The next prime is 213222013. The reversal of 213222011 is 110222312.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213222011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213222013) 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, 59495 + ... + 62976.

It is an arithmetic number, because the mean of its divisors is an integer number (53336556).

Almost surely, 2^213222011 is an apocalyptic number.

213222011 is a deficient number, since it is larger than the sum of its proper divisors (124213).

213222011 is a wasteful number, since it uses less digits than its factorization.

213222011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124212.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 213222011 is about 14602.1235099557. The cubic root of 213222011 is about 597.4166813672.

Adding to 213222011 its reverse (110222312), we get a palindrome (323444323).

The spelling of 213222011 in words is "two hundred thirteen million, two hundred twenty-two thousand, eleven".