12221212020001 has 4 divisors (see below), whose sum is σ = 12237104364100. Its totient is φ = 12205319675904.

The previous prime is 12221212019999. The next prime is 12221212020007. The reversal of 12221212020001 is 10002021212221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2552968035601 + 9668243984400 = 1597801^2 + 3109380^2 .

It is a cyclic number.

It is not a de Polignac number, because 12221212020001 - 2¹ = 12221212019999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12221212020007) 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, 7946170896 + ... + 7946172433.

It is an arithmetic number, because the mean of its divisors is an integer number (3059276091025).

Almost surely, 2^{12221212020001} is an apocalyptic number.

It is an amenable number.

12221212020001 is a deficient number, since it is larger than the sum of its proper divisors (15892344099).

12221212020001 is an equidigital number, since it uses as much as digits as its factorization.

12221212020001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15892344098.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 12221212020001 its reverse (10002021212221), we get a palindrome (22223233232222).

The spelling of 12221212020001 in words is "twelve trillion, two hundred twenty-one billion, two hundred twelve million, twenty thousand, one".