211201002212221 has 4 divisors (see below), whose sum is σ = 241372573956832. Its totient is φ = 181029430467612.

The previous prime is 211201002212209. The next prime is 211201002212273. The reversal of 211201002212221 is 122212200102112.

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 211201002212221 - 2⁹ = 211201002211709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211201002212201) 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, 15085785872295 + ... + 15085785872308.

It is an arithmetic number, because the mean of its divisors is an integer number (60343143489208).

Almost surely, 2^{211201002212221} is an apocalyptic number.

It is an amenable number.

211201002212221 is a deficient number, since it is larger than the sum of its proper divisors (30171571744611).

211201002212221 is an equidigital number, since it uses as much as digits as its factorization.

211201002212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30171571744610.

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

Adding to 211201002212221 its reverse (122212200102112), we get a palindrome (333413202314333).

The spelling of 211201002212221 in words is "two hundred eleven trillion, two hundred one billion, two million, two hundred twelve thousand, two hundred twenty-one".