212201022210021 has 96 divisors (see below), whose sum is σ = 358171416046080. Its totient is φ = 119924582400000.

The previous prime is 212201022209989. The next prime is 212201022210029. The reversal of 212201022210021 is 120012220102212.

It is a happy number.

212201022210021 is a `hidden beast` number, since 212 + 201 + 0 + 22 + 210 + 0 + 21 = 666.

It is not a de Polignac number, because 212201022210021 - 2⁵ = 212201022209989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212201022209976 and 212201022210003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212201022210029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 17530021 + ... + 27050021.

It is an arithmetic number, because the mean of its divisors is an integer number (3730952250480).

Almost surely, 2^{212201022210021} is an apocalyptic number.

It is an amenable number.

212201022210021 is a deficient number, since it is larger than the sum of its proper divisors (145970393836059).

212201022210021 is a wasteful number, since it uses less digits than its factorization.

212201022210021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9520347 (or 9520344 counting only the distinct ones).

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

Adding to 212201022210021 its reverse (120012220102212), we get a palindrome (332213242312233).

The spelling of 212201022210021 in words is "two hundred twelve trillion, two hundred one billion, twenty-two million, two hundred ten thousand, twenty-one".