222001211221 has 8 divisors (see below), whose sum is σ = 222729148224. Its totient is φ = 221273781600.

The previous prime is 222001211161. The next prime is 222001211273. The reversal of 222001211221 is 122112100222.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 222001211221 - 2¹⁹ = 222000686933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222001211195 and 222001211204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222001211021) 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, 759801 + ... + 1010593.

It is an arithmetic number, because the mean of its divisors is an integer number (27841143528).

Almost surely, 2^222001211221 is an apocalyptic number.

It is an amenable number.

222001211221 is a deficient number, since it is larger than the sum of its proper divisors (727937003).

222001211221 is a wasteful number, since it uses less digits than its factorization.

222001211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253691.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 222001211221 its reverse (122112100222), we get a palindrome (344113311443).

The spelling of 222001211221 in words is "two hundred twenty-two billion, one million, two hundred eleven thousand, two hundred twenty-one".