221102102320 has 40 divisors (see below), whose sum is σ = 560795334480. Its totient is φ = 80400764160.

The previous prime is 221102102257. The next prime is 221102102321. The reversal of 221102102320 is 23201201122.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×221102102320² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 221102102294 and 221102102303.

It is not an unprimeable number, because it can be changed into a prime (221102102321) 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, 125625315 + ... + 125627074.

It is an arithmetic number, because the mean of its divisors is an integer number (14019883362).

Almost surely, 2^221102102320 is an apocalyptic number.

221102102320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221102102320 is an abundant number, since it is smaller than the sum of its proper divisors (339693232160).

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

221102102320 is a wasteful number, since it uses less digits than its factorization.

221102102320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251252413 (or 251252407 counting only the distinct ones).

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

Adding to 221102102320 its reverse (23201201122), we get a palindrome (244303303442).

The spelling of 221102102320 in words is "two hundred twenty-one billion, one hundred two million, one hundred two thousand, three hundred twenty".