20144212121 has 8 divisors (see below), whose sum is σ = 21983284224. Its totient is φ = 18306436720.

The previous prime is 20144212073. The next prime is 20144212139. The reversal of 20144212121 is 12121244102.

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

It is not a de Polignac number, because 20144212121 - 2¹⁰ = 20144211097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20144212093 and 20144212102.

It is not an unprimeable number, because it can be changed into a prime (20144212141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 291545 + ... + 353958.

It is an arithmetic number, because the mean of its divisors is an integer number (2747910528).

Almost surely, 2^20144212121 is an apocalyptic number.

It is an amenable number.

20144212121 is a deficient number, since it is larger than the sum of its proper divisors (1839072103).

20144212121 is a wasteful number, since it uses less digits than its factorization.

20144212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648351.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 20144212121 its reverse (12121244102), we get a palindrome (32265456223).

The spelling of 20144212121 in words is "twenty billion, one hundred forty-four million, two hundred twelve thousand, one hundred twenty-one".