220112212221221 has 16 divisors (see below), whose sum is σ = 228666717534528. Its totient is φ = 211728440380800.

The previous prime is 220112212221163. The next prime is 220112212221241. The reversal of 220112212221221 is 122122212211022.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220112212221221 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 (220112212221241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117969470 + ... + 119820783.

It is an arithmetic number, because the mean of its divisors is an integer number (14291669845908).

Almost surely, 2^{220112212221221} is an apocalyptic number.

It is an amenable number.

220112212221221 is a deficient number, since it is larger than the sum of its proper divisors (8554505313307).

220112212221221 is a wasteful number, since it uses less digits than its factorization.

220112212221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237790612.

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 220112212221221 its reverse (122122212211022), we get a palindrome (342234424432243).

The spelling of 220112212221221 in words is "two hundred twenty trillion, one hundred twelve billion, two hundred twelve million, two hundred twenty-one thousand, two hundred twenty-one".