212221201212001 has 4 divisors (see below), whose sum is σ = 214281601223872. Its totient is φ = 210160801200132.

The previous prime is 212221201211963. The next prime is 212221201212037. The reversal of 212221201212001 is 100212102122212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212221201212001 - 2⁹ = 212221201211489 is a prime.

It is a super-2 number, since 2×212221201212001² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212221201212001.

It is not an unprimeable number, because it can be changed into a prime (212221204212001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1030200005781 + ... + 1030200005986.

It is an arithmetic number, because the mean of its divisors is an integer number (53570400305968).

Almost surely, 2^{212221201212001} is an apocalyptic number.

It is an amenable number.

212221201212001 is a deficient number, since it is larger than the sum of its proper divisors (2060400011871).

212221201212001 is a wasteful number, since it uses less digits than its factorization.

212221201212001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2060400011870.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 212221201212001 its reverse (100212102122212), we get a palindrome (312433303334213).

The spelling of 212221201212001 in words is "two hundred twelve trillion, two hundred twenty-one billion, two hundred one million, two hundred twelve thousand, one".