212222020120021 has 8 divisors (see below), whose sum is σ = 213054496029144. Its totient is φ = 211389596221440.

The previous prime is 212222020120013. The next prime is 212222020120031. The reversal of 212222020120021 is 120021020222212.

212222020120021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 156557901536100 + 55664118583921 = 12512310^2 + 7460839^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212222020120021 - 2³ = 212222020120013 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 (212222020120031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4815810 + ... + 21157411.

It is an arithmetic number, because the mean of its divisors is an integer number (26631812003643).

Almost surely, 2^{212222020120021} is an apocalyptic number.

It is an amenable number.

212222020120021 is a deficient number, since it is larger than the sum of its proper divisors (832475909123).

212222020120021 is a wasteful number, since it uses less digits than its factorization.

212222020120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26005271.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 212222020120021 its reverse (120021020222212), we get a palindrome (332243040342233).

The spelling of 212222020120021 in words is "two hundred twelve trillion, two hundred twenty-two billion, twenty million, one hundred twenty thousand, twenty-one".