221211222222101 has 16 divisors (see below), whose sum is σ = 222793301606400. Its totient is φ = 219634463051520.

The previous prime is 221211222222091. The next prime is 221211222222131. The reversal of 221211222222101 is 101222222112122.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221211222222101 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221211222222131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2600576111 + ... + 2600661171.

It is an arithmetic number, because the mean of its divisors is an integer number (13924581350400).

Almost surely, 2^{221211222222101} is an apocalyptic number.

It is an amenable number.

221211222222101 is a deficient number, since it is larger than the sum of its proper divisors (1582079384299).

221211222222101 is a wasteful number, since it uses less digits than its factorization.

221211222222101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116116.

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 221211222222101 its reverse (101222222112122), we get a palindrome (322433444334223).

The spelling of 221211222222101 in words is "two hundred twenty-one trillion, two hundred eleven billion, two hundred twenty-two million, two hundred twenty-two thousand, one hundred one".