2210222222221 has 4 divisors (see below), whose sum is σ = 2380239316252. Its totient is φ = 2040205128192.

The previous prime is 2210222222167. The next prime is 2210222222227. The reversal of 2210222222221 is 1222222220122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1151146597225 + 1059075624996 = 1072915^2 + 1029114^2 .

It is a cyclic number.

It is not a de Polignac number, because 2210222222221 - 2¹⁷ = 2210222091149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2210222222192 and 2210222222201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2210222222227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85008546996 + ... + 85008547021.

It is an arithmetic number, because the mean of its divisors is an integer number (595059829063).

Almost surely, 2^{2210222222221} is an apocalyptic number.

It is an amenable number.

2210222222221 is a deficient number, since it is larger than the sum of its proper divisors (170017094031).

2210222222221 is a wasteful number, since it uses less digits than its factorization.

2210222222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170017094030.

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 2210222222221 its reverse (1222222220122), we get a palindrome (3432444442343).

The spelling of 2210222222221 in words is "two trillion, two hundred ten billion, two hundred twenty-two million, two hundred twenty-two thousand, two hundred twenty-one".