212010220221 has 32 divisors (see below), whose sum is σ = 299638120320. Its totient is φ = 133103308800.

The previous prime is 212010220193. The next prime is 212010220229. The reversal of 212010220221 is 122022010212.

It is not a de Polignac number, because 212010220221 - 2¹⁵ = 212010187453 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212010220221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212010220229) 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, 25974381 + ... + 25982541.

It is an arithmetic number, because the mean of its divisors is an integer number (9363691260).

Almost surely, 2^212010220221 is an apocalyptic number.

It is an amenable number.

212010220221 is a deficient number, since it is larger than the sum of its proper divisors (87627900099).

212010220221 is a wasteful number, since it uses less digits than its factorization.

212010220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15517.

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

Adding to 212010220221 its reverse (122022010212), we get a palindrome (334032230433).

The spelling of 212010220221 in words is "two hundred twelve billion, ten million, two hundred twenty thousand, two hundred twenty-one".