221120121010 has 8 divisors (see below), whose sum is σ = 398016217836. Its totient is φ = 88448048400.

The previous prime is 221120120993. The next prime is 221120121041. The reversal of 221120121010 is 10121021122.

It can be written as a sum of positive squares in 2 ways, for example, as 207255294009 + 13864827001 = 455253^2 + 117749^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11056006041 + ... + 11056006060.

Almost surely, 2^221120121010 is an apocalyptic number.

221120121010 is a deficient number, since it is larger than the sum of its proper divisors (176896096826).

221120121010 is a wasteful number, since it uses less digits than its factorization.

221120121010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22112012108.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 221120121010 its reverse (10121021122), we get a palindrome (231241142132).

The spelling of 221120121010 in words is "two hundred twenty-one billion, one hundred twenty million, one hundred twenty-one thousand, ten".