222221012011211 has 4 divisors (see below), whose sum is σ = 222222223215000. Its totient is φ = 222219800807424.

The previous prime is 222221012011109. The next prime is 222221012011217. The reversal of 222221012011211 is 112110210122222.

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 222221012011211 - 2¹⁸ = 222221011749067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222221012011217) 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, 605326646 + ... + 605693643.

It is an arithmetic number, because the mean of its divisors is an integer number (55555555803750).

Almost surely, 2^{222221012011211} is an apocalyptic number.

222221012011211 is a deficient number, since it is larger than the sum of its proper divisors (1211203789).

222221012011211 is a wasteful number, since it uses less digits than its factorization.

222221012011211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1211203788.

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

Adding to 222221012011211 its reverse (112110210122222), we get a palindrome (334331222133433).

The spelling of 222221012011211 in words is "two hundred twenty-two trillion, two hundred twenty-one billion, twelve million, eleven thousand, two hundred eleven".