222221210012221 has 16 divisors (see below), whose sum is σ = 265325816787840. Its totient is φ = 182086344820800.

The previous prime is 222221210012167. The next prime is 222221210012231. The reversal of 222221210012221 is 122210012122222.

It is not a de Polignac number, because 222221210012221 - 2⁷ = 222221210012093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222221210012192 and 222221210012201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222221210012231) 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 15 ways as a sum of consecutive naturals, for example, 5419215951 + ... + 5419256956.

It is an arithmetic number, because the mean of its divisors is an integer number (16582863549240).

Almost surely, 2^{222221210012221} is an apocalyptic number.

It is an amenable number.

222221210012221 is a deficient number, since it is larger than the sum of its proper divisors (43104606775619).

222221210012221 is a wasteful number, since it uses less digits than its factorization.

222221210012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10838473044.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 222221210012221 its reverse (122210012122222), we get a palindrome (344431222134443).

The spelling of 222221210012221 in words is "two hundred twenty-two trillion, two hundred twenty-one billion, two hundred ten million, twelve thousand, two hundred twenty-one".