221220303102 has 24 divisors (see below), whose sum is σ = 507505401936. Its totient is φ = 69402447936.

The previous prime is 221220303053. The next prime is 221220303149. The reversal of 221220303102 is 201303022122.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 361470778 + ... + 361471389.

It is an arithmetic number, because the mean of its divisors is an integer number (21146058414).

Almost surely, 2^221220303102 is an apocalyptic number.

221220303102 is an abundant number, since it is smaller than the sum of its proper divisors (286285098834).

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

221220303102 is a wasteful number, since it uses less digits than its factorization.

221220303102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722942192 (or 722942189 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 221220303102 its reverse (201303022122), we get a palindrome (422523325224).

The spelling of 221220303102 in words is "two hundred twenty-one billion, two hundred twenty million, three hundred three thousand, one hundred two".