20421044101 has 8 divisors (see below), whose sum is σ = 20749528160. Its totient is φ = 20093257008.

The previous prime is 20421044089. The next prime is 20421044183. The reversal of 20421044101 is 10144012402.

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

It is a cyclic number.

It is not a de Polignac number, because 20421044101 - 2¹³ = 20421035909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20421044801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115011 + ... + 232528.

It is an arithmetic number, because the mean of its divisors is an integer number (2593691020).

Almost surely, 2^20421044101 is an apocalyptic number.

It is an amenable number.

20421044101 is a deficient number, since it is larger than the sum of its proper divisors (328484059).

20421044101 is an equidigital number, since it uses as much as digits as its factorization.

20421044101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348483.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 20421044101 its reverse (10144012402), we get a palindrome (30565056503).

The spelling of 20421044101 in words is "twenty billion, four hundred twenty-one million, forty-four thousand, one hundred one".