221121021104 has 80 divisors (see below), whose sum is σ = 444118574592. Its totient is φ = 106579732224.

The previous prime is 221121021083. The next prime is 221121021131. The reversal of 221121021104 is 401120121122.

It is a super-2 number, since 2×221121021104² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107183177 + ... + 107185239.

Almost surely, 2^221121021104 is an apocalyptic number.

It is an amenable number.

221121021104 is an abundant number, since it is smaller than the sum of its proper divisors (222997553488).

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

221121021104 is a wasteful number, since it uses less digits than its factorization.

221121021104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4074 (or 4068 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221121021104 its reverse (401120121122), we get a palindrome (622241142226).

The spelling of 221121021104 in words is "two hundred twenty-one billion, one hundred twenty-one million, twenty-one thousand, one hundred four".