212220010221 has 32 divisors (see below), whose sum is σ = 304590647808. Its totient is φ = 130942755840.

The previous prime is 212220010159. The next prime is 212220010253. The reversal of 212220010221 is 122010022212.

It is not a de Polignac number, because 212220010221 - 2²¹ = 212217913069 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212220010221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212220010291) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22540711 + ... + 22550123.

It is an arithmetic number, because the mean of its divisors is an integer number (9518457744).

Almost surely, 2^212220010221 is an apocalyptic number.

It is an amenable number.

212220010221 is a deficient number, since it is larger than the sum of its proper divisors (92370637587).

212220010221 is a wasteful number, since it uses less digits than its factorization.

212220010221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16741.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 212220010221 its reverse (122010022212), we get a palindrome (334230032433).

The spelling of 212220010221 in words is "two hundred twelve billion, two hundred twenty million, ten thousand, two hundred twenty-one".