222221211220101 has 4 divisors (see below), whose sum is σ = 296294948293472. Its totient is φ = 148147474146732.

The previous prime is 222221211219923. The next prime is 222221211220243. The reversal of 222221211220101 is 101022112122222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 222221211220101 - 2¹⁵ = 222221211187333 is a prime.

It is a super-2 number, since 2×222221211220101² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222221211228101) 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, 37036868536681 + ... + 37036868536686.

It is an arithmetic number, because the mean of its divisors is an integer number (74073737073368).

Almost surely, 2^{222221211220101} is an apocalyptic number.

It is an amenable number.

222221211220101 is a deficient number, since it is larger than the sum of its proper divisors (74073737073371).

222221211220101 is an equidigital number, since it uses as much as digits as its factorization.

222221211220101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74073737073370.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 222221211220101 its reverse (101022112122222), we get a palindrome (323243323342323).

The spelling of 222221211220101 in words is "two hundred twenty-two trillion, two hundred twenty-one billion, two hundred eleven million, two hundred twenty thousand, one hundred one".