212022201221021 has 12 divisors (see below), whose sum is σ = 233306690440320. Its totient is φ = 192129958076760.

The previous prime is 212022201220997. The next prime is 212022201221027. The reversal of 212022201221021 is 120122102220212.

It is a de Polignac number, because none of the positive numbers 2^k-212022201221021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212022201220984 and 212022201221002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212022201221027) 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 11 ways as a sum of consecutive naturals, for example, 10547308685 + ... + 10547328786.

It is an arithmetic number, because the mean of its divisors is an integer number (19442224203360).

Almost surely, 2^{212022201221021} is an apocalyptic number.

It is an amenable number.

212022201221021 is a deficient number, since it is larger than the sum of its proper divisors (21284489219299).

212022201221021 is a wasteful number, since it uses less digits than its factorization.

212022201221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21094637536 (or 21094637513 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 212022201221021 its reverse (120122102220212), we get a palindrome (332144303441233).

The spelling of 212022201221021 in words is "two hundred twelve trillion, twenty-two billion, two hundred one million, two hundred twenty-one thousand, twenty-one".