221121013330 has 32 divisors (see below), whose sum is σ = 478818437760. Its totient is φ = 71822764800.

The previous prime is 221121013313. The next prime is 221121013339. The reversal of 221121013330 is 33310121122.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a junction number, because it is equal to n+sod(n) for n = 221121013298 and 221121013307.

It is not an unprimeable number, because it can be changed into a prime (221121013339) 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 15 ways as a sum of consecutive naturals, for example, 83126871 + ... + 83129530.

It is an arithmetic number, because the mean of its divisors is an integer number (14963076180).

Almost surely, 2^221121013330 is an apocalyptic number.

221121013330 is an abundant number, since it is smaller than the sum of its proper divisors (257697424430).

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

221121013330 is a wasteful number, since it uses less digits than its factorization.

221121013330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166256434.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 221121013330 its reverse (33310121122), we get a palindrome (254431134452).

The spelling of 221121013330 in words is "two hundred twenty-one billion, one hundred twenty-one million, thirteen thousand, three hundred thirty".