220212211121221 has 12 divisors (see below), whose sum is σ = 242074191419200. Its totient is φ = 200174101138440.

The previous prime is 220212211121213. The next prime is 220212211121237. The reversal of 220212211121221 is 122121112212022.

It is not a de Polignac number, because 220212211121221 - 2³ = 220212211121213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220212211121192 and 220212211121201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220212211121261) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84244011 + ... + 86818648.

Almost surely, 2^{220212211121221} is an apocalyptic number.

It is an amenable number.

220212211121221 is a deficient number, since it is larger than the sum of its proper divisors (21861980297979).

220212211121221 is a wasteful number, since it uses less digits than its factorization.

220212211121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171073320 (or 171073309 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 220212211121221 its reverse (122121112212022), we get a palindrome (342333323333243).

The spelling of 220212211121221 in words is "two hundred twenty trillion, two hundred twelve billion, two hundred eleven million, one hundred twenty-one thousand, two hundred twenty-one".