212201021222211 has 16 divisors (see below), whose sum is σ = 340372565369600. Its totient is φ = 114875740811808.

The previous prime is 212201021222153. The next prime is 212201021222213. The reversal of 212201021222211 is 112222120102212.

It is not a de Polignac number, because 212201021222211 - 2⁶ = 212201021222147 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212201021222213) 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, 265916066296 + ... + 265916067093.

It is an arithmetic number, because the mean of its divisors is an integer number (21273285335600).

Almost surely, 2^{212201021222211} is an apocalyptic number.

212201021222211 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

212201021222211 is a deficient number, since it is larger than the sum of its proper divisors (128171544147389).

212201021222211 is a wasteful number, since it uses less digits than its factorization.

212201021222211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531832133418.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 212201021222211 its reverse (112222120102212), we get a palindrome (324423141324423).

The spelling of 212201021222211 in words is "two hundred twelve trillion, two hundred one billion, twenty-one million, two hundred twenty-two thousand, two hundred eleven".