213231212211 has 16 divisors (see below), whose sum is σ = 301044086784. Its totient is φ = 133786894464.

The previous prime is 213231212197. The next prime is 213231212263. The reversal of 213231212211 is 112212132312.

It is not a de Polignac number, because 213231212211 - 2¹⁸ = 213230950067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213231212291) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1548790 + ... + 1680836.

It is an arithmetic number, because the mean of its divisors is an integer number (18815255424).

Almost surely, 2^213231212211 is an apocalyptic number.

213231212211 is a deficient number, since it is larger than the sum of its proper divisors (87812874573).

213231212211 is a wasteful number, since it uses less digits than its factorization.

213231212211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163730.

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

Adding to 213231212211 its reverse (112212132312), we get a palindrome (325443344523).

The spelling of 213231212211 in words is "two hundred thirteen billion, two hundred thirty-one million, two hundred twelve thousand, two hundred eleven".