20124444121 has 16 divisors (see below), whose sum is σ = 21096633600. Its totient is φ = 19171152000.

The previous prime is 20124444103. The next prime is 20124444139. The reversal of 20124444121 is 12144442102.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20124444103) and next prime (20124444139).

It is a cyclic number.

It is not a de Polignac number, because 20124444121 - 2⁵ = 20124444089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20124447121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5223846 + ... + 5227696.

It is an arithmetic number, because the mean of its divisors is an integer number (1318539600).

Almost surely, 2^20124444121 is an apocalyptic number.

It is an amenable number.

20124444121 is a deficient number, since it is larger than the sum of its proper divisors (972189479).

20124444121 is a wasteful number, since it uses less digits than its factorization.

20124444121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6240.

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 20124444121 its reverse (12144442102), we get a palindrome (32268886223).

The spelling of 20124444121 in words is "twenty billion, one hundred twenty-four million, four hundred forty-four thousand, one hundred twenty-one".