212010023221 has 8 divisors (see below), whose sum is σ = 213413359320. Its totient is φ = 210611311872.

The previous prime is 212010023209. The next prime is 212010023287. The reversal of 212010023221 is 122320010212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 84640264900 + 127369758321 = 290930^2 + 356889^2 .

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 212010023221 - 2²¹ = 212007926069 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212010023195 and 212010023204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212010020221) 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, 1064176 + ... + 1247593.

It is an arithmetic number, because the mean of its divisors is an integer number (26676669915).

Almost surely, 2^212010023221 is an apocalyptic number.

It is an amenable number.

212010023221 is a deficient number, since it is larger than the sum of its proper divisors (1403336099).

212010023221 is a wasteful number, since it uses less digits than its factorization.

212010023221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2312375.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 212010023221 its reverse (122320010212), we get a palindrome (334330033433).

The spelling of 212010023221 in words is "two hundred twelve billion, ten million, twenty-three thousand, two hundred twenty-one".