221021112010 has 8 divisors (see below), whose sum is σ = 397838001636. Its totient is φ = 88408444800.

The previous prime is 221021112001. The next prime is 221021112031. The reversal of 221021112010 is 10211120122.

It can be written as a sum of positive squares in 2 ways, for example, as 189459102361 + 31562009649 = 435269^2 + 177657^2 .

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, 11051055591 + ... + 11051055610.

Almost surely, 2^221021112010 is an apocalyptic number.

221021112010 is a deficient number, since it is larger than the sum of its proper divisors (176816889626).

221021112010 is a wasteful number, since it uses less digits than its factorization.

221021112010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22102111208.

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

Adding to 221021112010 its reverse (10211120122), we get a palindrome (231232232132).

It can be divided in two parts, 2 and 21021112010, that added together give a palindrome (21021112012).

The spelling of 221021112010 in words is "two hundred twenty-one billion, twenty-one million, one hundred twelve thousand, ten".