212101201221001 has 16 divisors (see below), whose sum is σ = 220967582239360. Its totient is φ = 203438414471040.

The previous prime is 212101201220903. The next prime is 212101201221017. The reversal of 212101201221001 is 100122102101212.

It is a cyclic number.

It is not a de Polignac number, because 212101201221001 - 2²³ = 212101192832393 is a prime.

It is a super-3 number, since 3×212101201221001³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212101201221031) 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, 146813205 + ... + 148250866.

It is an arithmetic number, because the mean of its divisors is an integer number (13810473889960).

Almost surely, 2^{212101201221001} is an apocalyptic number.

It is an amenable number.

212101201221001 is a deficient number, since it is larger than the sum of its proper divisors (8866381018359).

212101201221001 is a wasteful number, since it uses less digits than its factorization.

212101201221001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295064416.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 212101201221001 its reverse (100122102101212), we get a palindrome (312223303322213).

The spelling of 212101201221001 in words is "two hundred twelve trillion, one hundred one billion, two hundred one million, two hundred twenty-one thousand, one".