12221212121201 has 8 divisors (see below), whose sum is σ = 12631764904704. Its totient is φ = 11811679346160.

The previous prime is 12221212121161. The next prime is 12221212121219. The reversal of 12221212121201 is 10212121212221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12221212121201 - 2²⁶ = 12221145012337 is a prime.

It is a super-2 number, since 2×12221212121201² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12221212121401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254977751 + ... + 255025676.

It is an arithmetic number, because the mean of its divisors is an integer number (1578970613088).

Almost surely, 2^{12221212121201} is an apocalyptic number.

It is an amenable number.

12221212121201 is a deficient number, since it is larger than the sum of its proper divisors (410552783503).

12221212121201 is an equidigital number, since it uses as much as digits as its factorization.

12221212121201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510004231.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 12221212121201 its reverse (10212121212221), we get a palindrome (22433333333422).

The spelling of 12221212121201 in words is "twelve trillion, two hundred twenty-one billion, two hundred twelve million, one hundred twenty-one thousand, two hundred one".