123021016013 has 4 divisors (see below), whose sum is σ = 140595446880. Its totient is φ = 105446585148.

The previous prime is 123021016003. The next prime is 123021016037. The reversal of 123021016013 is 310610120321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 123021016013 - 2²² = 123016821709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123021016003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8787215423 + ... + 8787215436.

It is an arithmetic number, because the mean of its divisors is an integer number (35148861720).

Almost surely, 2^123021016013 is an apocalyptic number.

It is an amenable number.

123021016013 is a deficient number, since it is larger than the sum of its proper divisors (17574430867).

123021016013 is an equidigital number, since it uses as much as digits as its factorization.

123021016013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17574430866.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 123021016013 its reverse (310610120321), we get a palindrome (433631136334).

The spelling of 123021016013 in words is "one hundred twenty-three billion, twenty-one million, sixteen thousand, thirteen".