212022121001221 has 4 divisors (see below), whose sum is σ = 212116311194944. Its totient is φ = 211927930807500.

The previous prime is 212022121001189. The next prime is 212022121001233. The reversal of 212022121001221 is 122100121220212.

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 212022121001221 - 2⁵ = 212022121001189 is a prime.

It is a super-3 number, since 3×212022121001221³ (a number of 44 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212022121001021) 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, 47095093485 + ... + 47095097986.

It is an arithmetic number, because the mean of its divisors is an integer number (53029077798736).

Almost surely, 2^{212022121001221} is an apocalyptic number.

It is an amenable number.

212022121001221 is a deficient number, since it is larger than the sum of its proper divisors (94190193723).

212022121001221 is an equidigital number, since it uses as much as digits as its factorization.

212022121001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94190193722.

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

Adding to 212022121001221 its reverse (122100121220212), we get a palindrome (334122242221433).

The spelling of 212022121001221 in words is "two hundred twelve trillion, twenty-two billion, one hundred twenty-one million, one thousand, two hundred twenty-one".