220122112221221 has 16 divisors (see below), whose sum is σ = 254561772816000. Its totient is φ = 186433646707968.

The previous prime is 220122112221181. The next prime is 220122112221223. The reversal of 220122112221221 is 122122211221022.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220122112221221 is a prime.

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 (220122112221223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115047896 + ... + 116945553.

It is an arithmetic number, because the mean of its divisors is an integer number (15910110801000).

Almost surely, 2^{220122112221221} is an apocalyptic number.

It is an amenable number.

220122112221221 is a deficient number, since it is larger than the sum of its proper divisors (34439660594779).

220122112221221 is a wasteful number, since it uses less digits than its factorization.

220122112221221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231995068.

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

Adding to 220122112221221 its reverse (122122211221022), we get a palindrome (342244323442243).

The spelling of 220122112221221 in words is "two hundred twenty trillion, one hundred twenty-two billion, one hundred twelve million, two hundred twenty-one thousand, two hundred twenty-one".