212022101221 has 16 divisors (see below), whose sum is σ = 266153932800. Its totient is φ = 164682741168.

The previous prime is 212022101143. The next prime is 212022101227. The reversal of 212022101221 is 122101220212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 212022101221 - 2¹¹ = 212022099173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212022101195 and 212022101204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212022101227) 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, 34652401 + ... + 34658518.

It is an arithmetic number, because the mean of its divisors is an integer number (16634620800).

Almost surely, 2^212022101221 is an apocalyptic number.

It is an amenable number.

212022101221 is a deficient number, since it is larger than the sum of its proper divisors (54131831579).

212022101221 is a wasteful number, since it uses less digits than its factorization.

212022101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69310968.

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

Adding to 212022101221 its reverse (122101220212), we get a palindrome (334123321433).

The spelling of 212022101221 in words is "two hundred twelve billion, twenty-two million, one hundred one thousand, two hundred twenty-one".