222121002221221 has 4 divisors (see below), whose sum is σ = 222175297263744. Its totient is φ = 222066707178700.

The previous prime is 222121002221219. The next prime is 222121002221231. The reversal of 222121002221221 is 122122200121222.

222121002221221 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, 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 222121002221221 - 2¹ = 222121002221219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222121002221192 and 222121002221201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222121002221231) 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, 27147515125 + ... + 27147523306.

It is an arithmetic number, because the mean of its divisors is an integer number (55543824315936).

Almost surely, 2^{222121002221221} is an apocalyptic number.

It is an amenable number.

222121002221221 is a deficient number, since it is larger than the sum of its proper divisors (54295042523).

222121002221221 is an equidigital number, since it uses as much as digits as its factorization.

222121002221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54295042522.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 222121002221221 its reverse (122122200121222), we get a palindrome (344243202342443).

The spelling of 222121002221221 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, two million, two hundred twenty-one thousand, two hundred twenty-one".