222221122010221 has 4 divisors (see below), whose sum is σ = 222359405224032. Its totient is φ = 222082838796412.

The previous prime is 222221122010203. The next prime is 222221122010269. The reversal of 222221122010221 is 122010221122222.

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 a cyclic number.

It is not a de Polignac number, because 222221122010221 - 2¹⁷ = 222221121879149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222221122010192 and 222221122010201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222221122010621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69141604495 + ... + 69141607708.

It is an arithmetic number, because the mean of its divisors is an integer number (55589851306008).

Almost surely, 2^{222221122010221} is an apocalyptic number.

It is an amenable number.

222221122010221 is a deficient number, since it is larger than the sum of its proper divisors (138283213811).

222221122010221 is a wasteful number, since it uses less digits than its factorization.

222221122010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138283213810.

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

Adding to 222221122010221 its reverse (122010221122222), we get a palindrome (344231343132443).

The spelling of 222221122010221 in words is "two hundred twenty-two trillion, two hundred twenty-one billion, one hundred twenty-two million, ten thousand, two hundred twenty-one".