220012212222221 has 4 divisors (see below), whose sum is σ = 231591802339200. Its totient is φ = 208432622105244.

The previous prime is 220012212222199. The next prime is 220012212222239. The reversal of 220012212222221 is 122222212210022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220012212222221 is a prime.

It is a super-2 number, since 2×220012212222221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220012212822221) 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, 5789795058461 + ... + 5789795058498.

It is an arithmetic number, because the mean of its divisors is an integer number (57897950584800).

Almost surely, 2^{220012212222221} is an apocalyptic number.

It is an amenable number.

220012212222221 is a deficient number, since it is larger than the sum of its proper divisors (11579590116979).

220012212222221 is a wasteful number, since it uses less digits than its factorization.

220012212222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11579590116978.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 220012212222221 its reverse (122222212210022), we get a palindrome (342234424432243).

The spelling of 220012212222221 in words is "two hundred twenty trillion, twelve billion, two hundred twelve million, two hundred twenty-two thousand, two hundred twenty-one".