221212002001211 has 4 divisors (see below), whose sum is σ = 238228309847472. Its totient is φ = 204195694154952.

The previous prime is 221212002001187. The next prime is 221212002001229. The reversal of 221212002001211 is 112100200212122.

221212002001211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221212002001211 - 2³⁴ = 221194822132027 is a prime.

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 221212002001211.

It is not an unprimeable number, because it can be changed into a prime (221212002031211) 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, 8508153923111 + ... + 8508153923136.

It is an arithmetic number, because the mean of its divisors is an integer number (59557077461868).

Almost surely, 2^{221212002001211} is an apocalyptic number.

221212002001211 is a deficient number, since it is larger than the sum of its proper divisors (17016307846261).

221212002001211 is a wasteful number, since it uses less digits than its factorization.

221212002001211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17016307846260.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221212002001211 its reverse (112100200212122), we get a palindrome (333312202213333).

The spelling of 221212002001211 in words is "two hundred twenty-one trillion, two hundred twelve billion, two million, one thousand, two hundred eleven".