202212222222221 has 8 divisors (see below), whose sum is σ = 204216907607544. Its totient is φ = 200207587507200.

The previous prime is 202212222222041. The next prime is 202212222222233. The reversal of 202212222222221 is 122222222212202.

It can be written as a sum of positive squares in 4 ways, for example, as 40686678289321 + 161525543932900 = 6378611^2 + 12709270^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202212222222221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202212222122221) 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, 4621316 + ... + 20634461.

It is an arithmetic number, because the mean of its divisors is an integer number (25527113450943).

Almost surely, 2^{202212222222221} is an apocalyptic number.

It is an amenable number.

202212222222221 is a deficient number, since it is larger than the sum of its proper divisors (2004685385323).

202212222222221 is a wasteful number, since it uses less digits than its factorization.

202212222222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25335151.

The product of its (nonzero) digits is 4096, while the sum is 26.

Adding to 202212222222221 its reverse (122222222212202), we get a palindrome (324434444434423).

The spelling of 202212222222221 in words is "two hundred two trillion, two hundred twelve billion, two hundred twenty-two million, two hundred twenty-two thousand, two hundred twenty-one".