212101222201 has 16 divisors (see below), whose sum is σ = 235942881408. Its totient is φ = 189056592000.

The previous prime is 212101222133. The next prime is 212101222259. The reversal of 212101222201 is 102222101212.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 212101222201 - 2¹⁷ = 212101091129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212101252201) 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, 812316 + ... + 1041181.

It is an arithmetic number, because the mean of its divisors is an integer number (14746430088).

Almost surely, 2^212101222201 is an apocalyptic number.

It is an amenable number.

212101222201 is a deficient number, since it is larger than the sum of its proper divisors (23841659207).

212101222201 is a wasteful number, since it uses less digits than its factorization.

212101222201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1853712.

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

Adding to 212101222201 its reverse (102222101212), we get a palindrome (314323323413).

The spelling of 212101222201 in words is "two hundred twelve billion, one hundred one million, two hundred twenty-two thousand, two hundred one".