222222020001221 has 8 divisors (see below), whose sum is σ = 225352162730304. Its totient is φ = 219091884359040.

The previous prime is 222222020001217. The next prime is 222222020001253. The reversal of 222222020001221 is 122100020222222.

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 222222020001221 - 2² = 222222020001217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222222020001193 and 222222020001202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222222020004221) 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, 118121870 + ... + 119988416.

It is an arithmetic number, because the mean of its divisors is an integer number (28169020341288).

Almost surely, 2^{222222020001221} is an apocalyptic number.

It is an amenable number.

222222020001221 is a deficient number, since it is larger than the sum of its proper divisors (3130142729083).

222222020001221 is a wasteful number, since it uses less digits than its factorization.

222222020001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3543451.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 222222020001221 its reverse (122100020222222), we get a palindrome (344322040223443).

The spelling of 222222020001221 in words is "two hundred twenty-two trillion, two hundred twenty-two billion, twenty million, one thousand, two hundred twenty-one".