221221201102 has 16 divisors (see below), whose sum is σ = 369700422912. Its totient is φ = 98415620920.

The previous prime is 221221201099. The next prime is 221221201133. The reversal of 221221201102 is 201102122122.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106972468 + ... + 106974535.

It is an arithmetic number, because the mean of its divisors is an integer number (23106276432).

Almost surely, 2^221221201102 is an apocalyptic number.

221221201102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221221201102 is a deficient number, since it is larger than the sum of its proper divisors (148479221810).

221221201102 is a wasteful number, since it uses less digits than its factorization.

221221201102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213947063.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221221201102 its reverse (201102122122), we get a palindrome (422323323224).

The spelling of 221221201102 in words is "two hundred twenty-one billion, two hundred twenty-one million, two hundred one thousand, one hundred two".