222101221011221 has 16 divisors (see below), whose sum is σ = 241336076451840. Its totient is φ = 203621104326960.

The previous prime is 222101221011209. The next prime is 222101221011247. The reversal of 222101221011221 is 122110122101222.

It is a cyclic number.

It is not a de Polignac number, because 222101221011221 - 2³⁰ = 222100147269397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222101221011193 and 222101221011202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222101221011521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36234116 + ... + 41917938.

It is an arithmetic number, because the mean of its divisors is an integer number (15083504778240).

Almost surely, 2^{222101221011221} is an apocalyptic number.

It is an amenable number.

222101221011221 is a deficient number, since it is larger than the sum of its proper divisors (19234855440619).

222101221011221 is a wasteful number, since it uses less digits than its factorization.

222101221011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5750216.

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

Adding to 222101221011221 its reverse (122110122101222), we get a palindrome (344211343112443).

The spelling of 222101221011221 in words is "two hundred twenty-two trillion, one hundred one billion, two hundred twenty-one million, eleven thousand, two hundred twenty-one".