20121344441 has 8 divisors (see below), whose sum is σ = 22123398144. Its totient is φ = 18148097520.

The previous prime is 20121344429. The next prime is 20121344461. The reversal of 20121344441 is 14444312102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20121344441 is a prime.

It is a super-2 number, since 2×20121344441² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20121344441.

It is not an unprimeable number, because it can be changed into a prime (20121344461) 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, 7200230 + ... + 7203023.

It is an arithmetic number, because the mean of its divisors is an integer number (2765424768).

Almost surely, 2^20121344441 is an apocalyptic number.

It is an amenable number.

20121344441 is a deficient number, since it is larger than the sum of its proper divisors (2002053703).

20121344441 is a wasteful number, since it uses less digits than its factorization.

20121344441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14403391.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 20121344441 its reverse (14444312102), we get a palindrome (34565656543).

The spelling of 20121344441 in words is "twenty billion, one hundred twenty-one million, three hundred forty-four thousand, four hundred forty-one".