212204213344221 has 16 divisors (see below), whose sum is σ = 330238775783424. Its totient is φ = 118679560046064.

The previous prime is 212204213344219. The next prime is 212204213344241. The reversal of 212204213344221 is 122443312402212.

It is not a de Polignac number, because 212204213344221 - 2¹ = 212204213344219 is a prime.

It is a super-2 number, since 2×212204213344221² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212204213344241) 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, 107499600505 + ... + 107499602478.

It is an arithmetic number, because the mean of its divisors is an integer number (20639923486464).

Almost surely, 2^{212204213344221} is an apocalyptic number.

212204213344221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

212204213344221 is a deficient number, since it is larger than the sum of its proper divisors (118034562439203).

212204213344221 is a wasteful number, since it uses less digits than its factorization.

212204213344221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214999203040.

The product of its (nonzero) digits is 36864, while the sum is 33.

Adding to 212204213344221 its reverse (122443312402212), we get a palindrome (334647525746433).

The spelling of 212204213344221 in words is "two hundred twelve trillion, two hundred four billion, two hundred thirteen million, three hundred forty-four thousand, two hundred twenty-one".