12020522223221 has 4 divisors (see below), whose sum is σ = 12300069251712. Its totient is φ = 11740975194732.

The previous prime is 12020522223173. The next prime is 12020522223263. The reversal of 12020522223221 is 12232222502021.

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 12020522223221 - 2²² = 12020518028917 is a prime.

It is a super-2 number, since 2×12020522223221² (a number of 27 digits) contains 22 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 (12020522223271) 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, 139773514181 + ... + 139773514266.

It is an arithmetic number, because the mean of its divisors is an integer number (3075017312928).

Almost surely, 2^{12020522223221} is an apocalyptic number.

It is an amenable number.

12020522223221 is a deficient number, since it is larger than the sum of its proper divisors (279547028491).

12020522223221 is an equidigital number, since it uses as much as digits as its factorization.

12020522223221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279547028490.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 12020522223221 its reverse (12232222502021), we get a palindrome (24252744725242).

The spelling of 12020522223221 in words is "twelve trillion, twenty billion, five hundred twenty-two million, two hundred twenty-three thousand, two hundred twenty-one".