212201020221021 has 128 divisors (see below), whose sum is σ = 347104555015680. Its totient is φ = 128930154312960.

The previous prime is 212201020220999. The next prime is 212201020221097. The reversal of 212201020221021 is 120122020102212.

It is a happy number.

212201020221021 is a `hidden beast` number, since 2 + 1 + 220 + 10 + 202 + 210 + 21 = 666.

It is not a de Polignac number, because 212201020221021 - 2⁹ = 212201020220509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212201020220985 and 212201020221003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212201020221221) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 733574211 + ... + 733863423.

It is an arithmetic number, because the mean of its divisors is an integer number (2711754336060).

Almost surely, 2^{212201020221021} is an apocalyptic number.

It is an amenable number.

212201020221021 is a deficient number, since it is larger than the sum of its proper divisors (134903534794659).

212201020221021 is a wasteful number, since it uses less digits than its factorization.

212201020221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289575 (or 289557 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 212201020221021 its reverse (120122020102212), we get a palindrome (332323040323233).

The spelling of 212201020221021 in words is "two hundred twelve trillion, two hundred one billion, twenty million, two hundred twenty-one thousand, twenty-one".