221012220020202 has 64 divisors (see below), whose sum is σ = 534053261064960. Its totient is φ = 67343529304512.

The previous prime is 221012220020201. The next prime is 221012220020243. The reversal of 221012220020202 is 202020022210122.

221012220020202 is a `hidden beast` number, since 2 + 210 + 12 + 220 + 0 + 20 + 202 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (221012220020201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1528239453 + ... + 1528384064.

It is an arithmetic number, because the mean of its divisors is an integer number (8344582204140).

Almost surely, 2^{221012220020202} is an apocalyptic number.

221012220020202 is an abundant number, since it is smaller than the sum of its proper divisors (313041041044758).

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

221012220020202 is a wasteful number, since it uses less digits than its factorization.

221012220020202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3056623644 (or 3056623638 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 221012220020202 its reverse (202020022210122), we get a palindrome (423032242230324).

The spelling of 221012220020202 in words is "two hundred twenty-one trillion, twelve billion, two hundred twenty million, twenty thousand, two hundred two".