20121232343 has 4 divisors (see below), whose sum is σ = 20156595360. Its totient is φ = 20085869328.

The previous prime is 20121232331. The next prime is 20121232349. The reversal of 20121232343 is 34323212102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20121232343 - 2²⁴ = 20104455127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121232349) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17680655 + ... + 17681792.

It is an arithmetic number, because the mean of its divisors is an integer number (5039148840).

Almost surely, 2^20121232343 is an apocalyptic number.

20121232343 is a deficient number, since it is larger than the sum of its proper divisors (35363017).

20121232343 is an equidigital number, since it uses as much as digits as its factorization.

20121232343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35363016.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 20121232343 its reverse (34323212102), we get a palindrome (54444444445).

The spelling of 20121232343 in words is "twenty billion, one hundred twenty-one million, two hundred thirty-two thousand, three hundred forty-three".