22012222101221 has 8 divisors (see below), whose sum is σ = 24013774927584. Its totient is φ = 20010742895920.

The previous prime is 22012222101217. The next prime is 22012222101229. The reversal of 22012222101221 is 12210122221022.

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 22012222101221 - 2² = 22012222101217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22012222101193 and 22012222101202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22012222101229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17779166 + ... + 18976911.

It is an arithmetic number, because the mean of its divisors is an integer number (3001721865948).

Almost surely, 2^{22012222101221} is an apocalyptic number.

It is an amenable number.

22012222101221 is a deficient number, since it is larger than the sum of its proper divisors (2001552826363).

22012222101221 is a wasteful number, since it uses less digits than its factorization.

22012222101221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36810531.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 22012222101221 its reverse (12210122221022), we get a palindrome (34222344322243).

The spelling of 22012222101221 in words is "twenty-two trillion, twelve billion, two hundred twenty-two million, one hundred one thousand, two hundred twenty-one".