2222222122221 has 8 divisors (see below), whose sum is σ = 2963077780800. Its totient is φ = 1481423939232.

The previous prime is 2222222122213. The next prime is 2222222122249. The reversal of 2222222122221 is 1222212222222.

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

It is not a de Polignac number, because 2222222122221 - 2³ = 2222222122213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2222222122191 and 2222222122200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2222222121221) 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, 14278600 + ... + 14433393.

It is an arithmetic number, because the mean of its divisors is an integer number (370384722600).

Almost surely, 2^{2222222122221} is an apocalyptic number.

It is an amenable number.

2222222122221 is a deficient number, since it is larger than the sum of its proper divisors (740855658579).

2222222122221 is a wasteful number, since it uses less digits than its factorization.

2222222122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28737795.

The product of its digits is 2048, while the sum is 24.

Adding to 2222222122221 its reverse (1222212222222), we get a palindrome (3444434344443).

The spelling of 2222222122221 in words is "two trillion, two hundred twenty-two billion, two hundred twenty-two million, one hundred twenty-two thousand, two hundred twenty-one".