213122231211 has 8 divisors (see below), whose sum is σ = 291843055504. Its totient is φ = 138241447200.

The previous prime is 213122231197. The next prime is 213122231219. The reversal of 213122231211 is 112132221312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 213122231211 - 2⁷ = 213122231083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213122231219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 960009940 + ... + 960010161.

It is an arithmetic number, because the mean of its divisors is an integer number (36480381938).

Almost surely, 2^213122231211 is an apocalyptic number.

213122231211 is a deficient number, since it is larger than the sum of its proper divisors (78720824293).

213122231211 is a wasteful number, since it uses less digits than its factorization.

213122231211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1920020141.

The product of its digits is 288, while the sum is 21.

Adding to 213122231211 its reverse (112132221312), we get a palindrome (325254452523).

The spelling of 213122231211 in words is "two hundred thirteen billion, one hundred twenty-two million, two hundred thirty-one thousand, two hundred eleven".