222221201001221 has 8 divisors (see below), whose sum is σ = 239281053920640. Its totient is φ = 205604461144768.

The previous prime is 222221201001013. The next prime is 222221201001227. The reversal of 222221201001221 is 122100102122222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222221201001221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222221201001193 and 222221201001202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222221201001227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110778264701 + ... + 110778266706.

It is an arithmetic number, because the mean of its divisors is an integer number (29910131740080).

Almost surely, 2^{222221201001221} is an apocalyptic number.

It is an amenable number.

222221201001221 is a deficient number, since it is larger than the sum of its proper divisors (17059852919419).

222221201001221 is a wasteful number, since it uses less digits than its factorization.

222221201001221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221556531483.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 222221201001221 its reverse (122100102122222), we get a palindrome (344321303123443).

The spelling of 222221201001221 in words is "two hundred twenty-two trillion, two hundred twenty-one billion, two hundred one million, one thousand, two hundred twenty-one".