20121244001 has 8 divisors (see below), whose sum is σ = 20594232384. Its totient is φ = 19648485360.

The previous prime is 20121243917. The next prime is 20121244027. The reversal of 20121244001 is 10044212102.

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

It is not a de Polignac number, because 20121244001 - 2¹⁸ = 20120981857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20121244061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126635 + ... + 237231.

It is an arithmetic number, because the mean of its divisors is an integer number (2574279048).

Almost surely, 2^20121244001 is an apocalyptic number.

It is an amenable number.

20121244001 is a deficient number, since it is larger than the sum of its proper divisors (472988383).

20121244001 is a wasteful number, since it uses less digits than its factorization.

20121244001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114871.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20121244001 its reverse (10044212102), we get a palindrome (30165456103).

The spelling of 20121244001 in words is "twenty billion, one hundred twenty-one million, two hundred forty-four thousand, one".