20124110221 has 4 divisors (see below), whose sum is σ = 20124437632. Its totient is φ = 20123782812.

The previous prime is 20124110219. The next prime is 20124110287. The reversal of 20124110221 is 12201142102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20124110221 - 2¹ = 20124110219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20124110195 and 20124110204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20124510221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40701 + ... + 204706.

It is an arithmetic number, because the mean of its divisors is an integer number (5031109408).

Almost surely, 2^20124110221 is an apocalyptic number.

It is an amenable number.

20124110221 is a deficient number, since it is larger than the sum of its proper divisors (327411).

20124110221 is an equidigital number, since it uses as much as digits as its factorization.

20124110221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327410.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 20124110221 its reverse (12201142102), we get a palindrome (32325252323).

The spelling of 20124110221 in words is "twenty billion, one hundred twenty-four million, one hundred ten thousand, two hundred twenty-one".