213122321213211 has 32 divisors (see below), whose sum is σ = 315945371327040. Its totient is φ = 141987705753600.

The previous prime is 213122321213209. The next prime is 213122321213237. The reversal of 213122321213211 is 112312123221312.

213122321213211 is a `hidden beast` number, since 2 + 1 + 3 + 1 + 2 + 232 + 1 + 213 + 211 = 666.

It is not a de Polignac number, because 213122321213211 - 2¹ = 213122321213209 is a prime.

It is a super-2 number, since 2×213122321213211² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (213122321213261) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 277039081 + ... + 277807301.

It is an arithmetic number, because the mean of its divisors is an integer number (9873292853970).

Almost surely, 2^{213122321213211} is an apocalyptic number.

213122321213211 is a deficient number, since it is larger than the sum of its proper divisors (102823050113829).

213122321213211 is a wasteful number, since it uses less digits than its factorization.

213122321213211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775004 (or 774998 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

Adding to 213122321213211 its reverse (112312123221312), we get a palindrome (325434444434523).

The spelling of 213122321213211 in words is "two hundred thirteen trillion, one hundred twenty-two billion, three hundred twenty-one million, two hundred thirteen thousand, two hundred eleven".