222201022211221 has 8 divisors (see below), whose sum is σ = 226928927960064. Its totient is φ = 217473125813520.

The previous prime is 222201022211183. The next prime is 222201022211261. The reversal of 222201022211221 is 122112220102222.

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 222201022211221 - 2²⁷ = 222200887993493 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222201022211192 and 222201022211201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222201022211261) 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, 67915356 + ... + 71111866.

It is an arithmetic number, because the mean of its divisors is an integer number (28366115995008).

Almost surely, 2^{222201022211221} is an apocalyptic number.

It is an amenable number.

222201022211221 is a deficient number, since it is larger than the sum of its proper divisors (4727905748843).

222201022211221 is a wasteful number, since it uses less digits than its factorization.

222201022211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4675571.

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

Adding to 222201022211221 its reverse (122112220102222), we get a palindrome (344313242313443).

The spelling of 222201022211221 in words is "two hundred twenty-two trillion, two hundred one billion, twenty-two million, two hundred eleven thousand, two hundred twenty-one".