12222221101001 has 4 divisors (see below), whose sum is σ = 12222334548612. Its totient is φ = 12222107653392.

The previous prime is 12222221100997. The next prime is 12222221101019. The reversal of 12222221101001 is 10010112222221.

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 2657421625600 + 9564799475401 = 1630160^2 + 3092701^2 .

It is a cyclic number.

It is not a de Polignac number, because 12222221101001 - 2² = 12222221100997 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12222221101301) 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, 56562050 + ... + 56777723.

It is an arithmetic number, because the mean of its divisors is an integer number (3055583637153).

Almost surely, 2^{12222221101001} is an apocalyptic number.

It is an amenable number.

12222221101001 is a deficient number, since it is larger than the sum of its proper divisors (113447611).

12222221101001 is a wasteful number, since it uses less digits than its factorization.

12222221101001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113447610.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12222221101001 its reverse (10010112222221), we get a palindrome (22232333323222).

The spelling of 12222221101001 in words is "twelve trillion, two hundred twenty-two billion, two hundred twenty-one million, one hundred one thousand, one".