20110000000221 has 12 divisors (see below), whose sum is σ = 30123621399872. Its totient is φ = 13406666666652.

The previous prime is 20110000000117. The next prime is 20110000000261. The reversal of 20110000000221 is 12200000001102.

It is not a de Polignac number, because 20110000000221 - 2¹³ = 20109999992029 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20110000000261) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41378600581 + ... + 41378601066.

Almost surely, 2^{20110000000221} is an apocalyptic number.

It is an amenable number.

20110000000221 is a deficient number, since it is larger than the sum of its proper divisors (10013621399651).

20110000000221 is an frugal number, since it uses more digits than its factorization.

20110000000221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82757201662 (or 82757201650 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20110000000221 its reverse (12200000001102), we get a palindrome (32310000001323).

The spelling of 20110000000221 in words is "twenty trillion, one hundred ten billion, two hundred twenty-one", and thus it is an aban number.