20121232243 has 8 divisors (see below), whose sum is σ = 23098815488. Its totient is φ = 17169429384.

The previous prime is 20121232129. The next prime is 20121232259. The reversal of 20121232243 is 34223212102.

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 20121232243 - 2¹⁷ = 20121101171 is a prime.

It is a super-2 number, since 2×20121232243² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20121232643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6443421 + ... + 6446542.

It is an arithmetic number, because the mean of its divisors is an integer number (2887351936).

Almost surely, 2^20121232243 is an apocalyptic number.

20121232243 is a deficient number, since it is larger than the sum of its proper divisors (2977583245).

20121232243 is a wasteful number, since it uses less digits than its factorization.

20121232243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12890193.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 20121232243 its reverse (34223212102), we get a palindrome (54344444345).

The spelling of 20121232243 in words is "twenty billion, one hundred twenty-one million, two hundred thirty-two thousand, two hundred forty-three".