212143312214221 has 16 divisors (see below), whose sum is σ = 227017299801600. Its totient is φ = 197667205514928.

The previous prime is 212143312214179. The next prime is 212143312214243. The reversal of 212143312214221 is 122412213341212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 212143312214221 - 2¹³ = 212143312206029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212143312214621) 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, 375076705 + ... + 375641878.

It is an arithmetic number, because the mean of its divisors is an integer number (14188581237600).

Almost surely, 2^{212143312214221} is an apocalyptic number.

It is an amenable number.

212143312214221 is a deficient number, since it is larger than the sum of its proper divisors (14873987587379).

212143312214221 is a wasteful number, since it uses less digits than its factorization.

212143312214221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750718848.

The product of its digits is 9216, while the sum is 31.

Adding to 212143312214221 its reverse (122412213341212), we get a palindrome (334555525555433).

The spelling of 212143312214221 in words is "two hundred twelve trillion, one hundred forty-three billion, three hundred twelve million, two hundred fourteen thousand, two hundred twenty-one".