221001021212202 has 216 divisors, whose sum is σ = 648268644320388. Its totient is φ = 54026223229440.

The previous prime is 221001021212161. The next prime is 221001021212227. The reversal of 221001021212202 is 202212120100122.

It is a happy number.

221001021212202 is a `hidden beast` number, since 221 + 0 + 0 + 10 + 21 + 212 + 202 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 184737271892481 + 36263749319721 = 13591809^2 + 6021939^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 59091913 + ... + 62720460.

Almost surely, 2^{221001021212202} is an apocalyptic number.

221001021212202 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221001021212202 is an abundant number, since it is smaller than the sum of its proper divisors (427267623108186).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221001021212202 is a wasteful number, since it uses less digits than its factorization.

221001021212202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121812434 (or 121812413 counting only the distinct ones).

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

Adding to 221001021212202 its reverse (202212120100122), we get a palindrome (423213141312324).

The spelling of 221001021212202 in words is "two hundred twenty-one trillion, one billion, twenty-one million, two hundred twelve thousand, two hundred two".