12220202101221 has 16 divisors (see below), whose sum is σ = 18169360536000. Its totient is φ = 8117390560464.

The previous prime is 12220202101193. The next prime is 12220202101231. The reversal of 12220202101221 is 12210120202221.

It is a happy number.

12220202101221 is a `hidden beast` number, since 12 + 220 + 2 + 0 + 210 + 1 + 221 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-12220202101221 is a prime.

It is a super-2 number, since 2×12220202101221² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12220202101194 and 12220202101203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12220202101231) 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, 816960171 + ... + 816975128.

It is an arithmetic number, because the mean of its divisors is an integer number (1135585033500).

Almost surely, 2^{12220202101221} is an apocalyptic number.

It is an amenable number.

12220202101221 is a deficient number, since it is larger than the sum of its proper divisors (5949158434779).

12220202101221 is a wasteful number, since it uses less digits than its factorization.

12220202101221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1633935585 (or 1633935579 counting only the distinct ones).

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

Adding to 12220202101221 its reverse (12210120202221), we get a palindrome (24430322303442).

The spelling of 12220202101221 in words is "twelve trillion, two hundred twenty billion, two hundred two million, one hundred one thousand, two hundred twenty-one".