222101220121111 has 6 divisors (see below), whose sum is σ = 235934514108200. Its totient is φ = 209036442466656.

The previous prime is 222101220121091. The next prime is 222101220121153. The reversal of 222101220121111 is 111121022101222.

It is a happy number.

It is not a de Polignac number, because 222101220121111 - 2⁹ = 222101220120599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222101020121111) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 384258166011 + ... + 384258166588.

Almost surely, 2^{222101220121111} is an apocalyptic number.

222101220121111 is a deficient number, since it is larger than the sum of its proper divisors (13833293987089).

222101220121111 is an equidigital number, since it uses as much as digits as its factorization.

222101220121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768516332633 (or 768516332616 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 222101220121111 its reverse (111121022101222), we get a palindrome (333222242222333).

The spelling of 222101220121111 in words is "two hundred twenty-two trillion, one hundred one billion, two hundred twenty million, one hundred twenty-one thousand, one hundred eleven".