2211222022221 has 8 divisors (see below), whose sum is σ = 3049961410080. Its totient is φ = 1423315324592.

The previous prime is 2211222022213. The next prime is 2211222022231. The reversal of 2211222022221 is 1222202221122.

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 2211222022221 - 2³ = 2211222022213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211222022211) 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, 12708172455 + ... + 12708172628.

It is an arithmetic number, because the mean of its divisors is an integer number (381245176260).

Almost surely, 2^{2211222022221} is an apocalyptic number.

It is an amenable number.

2211222022221 is a deficient number, since it is larger than the sum of its proper divisors (838739387859).

2211222022221 is a wasteful number, since it uses less digits than its factorization.

2211222022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25416345115.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 2211222022221 its reverse (1222202221122), we get a palindrome (3433424243343).

The spelling of 2211222022221 in words is "two trillion, two hundred eleven billion, two hundred twenty-two million, twenty-two thousand, two hundred twenty-one".