220012220101221 has 12 divisors (see below), whose sum is σ = 317795559382860. Its totient is φ = 146674753240320.

The previous prime is 220012220101189. The next prime is 220012220101229. The reversal of 220012220101221 is 122101022210022.

It is a happy number.

220012220101221 is a `hidden beast` number, since 2 + 200 + 12 + 220 + 10 + 1 + 221 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1805731250625 + 218206488850596 = 1343775^2 + 14771814^2 .

It is not a de Polignac number, because 220012220101221 - 2⁵ = 220012220101189 is a prime.

It is a super-2 number, since 2×220012220101221² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 220012220101194 and 220012220101203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220012220101229) 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, 34733115 + ... + 40576023.

It is an arithmetic number, because the mean of its divisors is an integer number (26482963281905).

Almost surely, 2^{220012220101221} is an apocalyptic number.

It is an amenable number.

220012220101221 is a deficient number, since it is larger than the sum of its proper divisors (97783339281639).

220012220101221 is a wasteful number, since it uses less digits than its factorization.

220012220101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10026756 (or 10026753 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 220012220101221 its reverse (122101022210022), we get a palindrome (342113242311243).

The spelling of 220012220101221 in words is "two hundred twenty trillion, twelve billion, two hundred twenty million, one hundred one thousand, two hundred twenty-one".