222021121120221 has 4 divisors (see below), whose sum is σ = 296028161493632. Its totient is φ = 148014080746812.

The previous prime is 222021121120193. The next prime is 222021121120223. The reversal of 222021121120221 is 122021121120222.

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 not a de Polignac number, because 222021121120221 - 2⁹ = 222021121119709 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 (222021121120223) 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, 37003520186701 + ... + 37003520186706.

It is an arithmetic number, because the mean of its divisors is an integer number (74007040373408).

Almost surely, 2^{222021121120221} is an apocalyptic number.

It is an amenable number.

222021121120221 is a deficient number, since it is larger than the sum of its proper divisors (74007040373411).

222021121120221 is an equidigital number, since it uses as much as digits as its factorization.

222021121120221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74007040373410.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 222021121120221 its reverse (122021121120222), we get a palindrome (344042242240443).

Subtracting from 222021121120221 its reverse (122021121120222), we obtain a palindrome (99999999999999).

The spelling of 222021121120221 in words is "two hundred twenty-two trillion, twenty-one billion, one hundred twenty-one million, one hundred twenty thousand, two hundred twenty-one".