221021020330 has 128 divisors (see below), whose sum is σ = 478430530560. Its totient is φ = 72589271040.

The previous prime is 221021020309. The next prime is 221021020349. The reversal of 221021020330 is 33020120122.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5028991 + ... + 5072749.

It is an arithmetic number, because the mean of its divisors is an integer number (3737738520).

Almost surely, 2^221021020330 is an apocalyptic number.

221021020330 is an abundant number, since it is smaller than the sum of its proper divisors (257409510230).

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

221021020330 is a wasteful number, since it uses less digits than its factorization.

221021020330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43904.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 221021020330 its reverse (33020120122), we get a palindrome (254041140452).

The spelling of 221021020330 in words is "two hundred twenty-one billion, twenty-one million, twenty thousand, three hundred thirty".