212201101221121 has 4 divisors (see below), whose sum is σ = 212292923422144. Its totient is φ = 212109279020100.

The previous prime is 212201101221071. The next prime is 212201101221149. The reversal of 212201101221121 is 121122101102212.

It is a happy number.

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 212201101221121 - 2²¹ = 212201099123969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212201101224121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45911097045 + ... + 45911101666.

It is an arithmetic number, because the mean of its divisors is an integer number (53073230855536).

Almost surely, 2^{212201101221121} is an apocalyptic number.

It is an amenable number.

212201101221121 is a deficient number, since it is larger than the sum of its proper divisors (91822201023).

212201101221121 is an equidigital number, since it uses as much as digits as its factorization.

212201101221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91822201022.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 212201101221121 its reverse (121122101102212), we get a palindrome (333323202323333).

The spelling of 212201101221121 in words is "two hundred twelve trillion, two hundred one billion, one hundred one million, two hundred twenty-one thousand, one hundred twenty-one".