212221022101 has 16 divisors (see below), whose sum is σ = 249366205440. Its totient is φ = 178523518320.

The previous prime is 212221022099. The next prime is 212221022161. The reversal of 212221022101 is 101220122212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 212221022101 - 2¹ = 212221022099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212221022161) 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, 11798125 + ... + 11816098.

It is an arithmetic number, because the mean of its divisors is an integer number (15585387840).

Almost surely, 2^212221022101 is an apocalyptic number.

It is an amenable number.

212221022101 is a deficient number, since it is larger than the sum of its proper divisors (37145183339).

212221022101 is a wasteful number, since it uses less digits than its factorization.

212221022101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23614296.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 212221022101 its reverse (101220122212), we get a palindrome (313441144313).

The spelling of 212221022101 in words is "two hundred twelve billion, two hundred twenty-one million, twenty-two thousand, one hundred one".