20121024243 has 8 divisors (see below), whose sum is σ = 27994468608. Its totient is φ = 12830798024.

The previous prime is 20121024233. The next prime is 20121024247. The reversal of 20121024243 is 34242012102.

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

It is a cyclic number.

It is not a de Polignac number, because 20121024243 - 2¹² = 20121020147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20121024247) 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, 145804455 + ... + 145804592.

It is an arithmetic number, because the mean of its divisors is an integer number (3499308576).

Almost surely, 2^20121024243 is an apocalyptic number.

20121024243 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20121024243 is a deficient number, since it is larger than the sum of its proper divisors (7873444365).

20121024243 is a wasteful number, since it uses less digits than its factorization.

20121024243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291609073.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 20121024243 its reverse (34242012102), we get a palindrome (54363036345).

The spelling of 20121024243 in words is "twenty billion, one hundred twenty-one million, twenty-four thousand, two hundred forty-three".