212002022221 has 16 divisors (see below), whose sum is σ = 241385914368. Its totient is φ = 184307151600.

The previous prime is 212002022203. The next prime is 212002022233. The reversal of 212002022221 is 122220200212.

It is not a de Polignac number, because 212002022221 - 2⁷ = 212002022093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212002022195 and 212002022204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212002022201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1030876 + ... + 1219306.

It is an arithmetic number, because the mean of its divisors is an integer number (15086619648).

Almost surely, 2^212002022221 is an apocalyptic number.

It is an amenable number.

212002022221 is a deficient number, since it is larger than the sum of its proper divisors (29383892147).

212002022221 is a wasteful number, since it uses less digits than its factorization.

212002022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192912.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 212002022221 its reverse (122220200212), we get a palindrome (334222222433).

The spelling of 212002022221 in words is "two hundred twelve billion, two million, twenty-two thousand, two hundred twenty-one".