22101221221211 has 4 divisors (see below), whose sum is σ = 24110423150424. Its totient is φ = 20092019292000.

The previous prime is 22101221221151. The next prime is 22101221221213. The reversal of 22101221221211 is 11212212210122.

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

It is a cyclic number.

It is not a de Polignac number, because 22101221221211 - 2¹⁰ = 22101221220187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22101221221213) 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 3 ways as a sum of consecutive naturals, for example, 1004600964590 + ... + 1004600964611.

It is an arithmetic number, because the mean of its divisors is an integer number (6027605787606).

Almost surely, 2^{22101221221211} is an apocalyptic number.

22101221221211 is a deficient number, since it is larger than the sum of its proper divisors (2009201929213).

22101221221211 is a wasteful number, since it uses less digits than its factorization.

22101221221211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2009201929212.

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

Adding to 22101221221211 its reverse (11212212210122), we get a palindrome (33313433431333).

The spelling of 22101221221211 in words is "twenty-two trillion, one hundred one billion, two hundred twenty-one million, two hundred twenty-one thousand, two hundred eleven".