4020043000123 has 4 divisors (see below), whose sum is σ = 4055618602008. Its totient is φ = 3984467398240.

The previous prime is 4020043000117. The next prime is 4020043000201. The reversal of 4020043000123 is 3210003400204.

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 4020043000123 - 2¹³ = 4020042991931 is a prime.

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 4020043000123.

It is not an unprimeable number, because it can be changed into a prime (4020043000223) 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, 17787800773 + ... + 17787800998.

It is an arithmetic number, because the mean of its divisors is an integer number (1013904650502).

Almost surely, 2^{4020043000123} is an apocalyptic number.

4020043000123 is a deficient number, since it is larger than the sum of its proper divisors (35575601885).

4020043000123 is a wasteful number, since it uses less digits than its factorization.

4020043000123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35575601884.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 4020043000123 its reverse (3210003400204), we get a palindrome (7230046400327).

The spelling of 4020043000123 in words is "four trillion, twenty billion, forty-three million, one hundred twenty-three", and thus it is an aban number.