221321020102 has 16 divisors (see below), whose sum is σ = 408592652832. Its totient is φ = 87555568320.

The previous prime is 221321020099. The next prime is 221321020103. The reversal of 221321020102 is 201020123122.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221321020103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 608024599 + ... + 608024962.

It is an arithmetic number, because the mean of its divisors is an integer number (25537040802).

Almost surely, 2^221321020102 is an apocalyptic number.

221321020102 is a deficient number, since it is larger than the sum of its proper divisors (187271632730).

221321020102 is a wasteful number, since it uses less digits than its factorization.

221321020102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1216049583.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 221321020102 its reverse (201020123122), we get a palindrome (422341143224).

The spelling of 221321020102 in words is "two hundred twenty-one billion, three hundred twenty-one million, twenty thousand, one hundred two".