20121244043 has 4 divisors (see below), whose sum is σ = 20195492448. Its totient is φ = 20046995640.

The previous prime is 20121244027. The next prime is 20121244061. The reversal of 20121244043 is 34044212102.

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 20121244043 - 2⁴ = 20121244027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20121244343) 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, 37123796 + ... + 37124337.

It is an arithmetic number, because the mean of its divisors is an integer number (5048873112).

Almost surely, 2^20121244043 is an apocalyptic number.

20121244043 is a deficient number, since it is larger than the sum of its proper divisors (74248405).

20121244043 is an equidigital number, since it uses as much as digits as its factorization.

20121244043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74248404.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 20121244043 its reverse (34044212102), we get a palindrome (54165456145).

The spelling of 20121244043 in words is "twenty billion, one hundred twenty-one million, two hundred forty-four thousand, forty-three".