20123001313021 has 8 divisors (see below), whose sum is σ = 20521035773784. Its totient is φ = 19725646674240.

The previous prime is 20123001313007. The next prime is 20123001313033. The reversal of 20123001313021 is 12031310032102.

It can be written as a sum of positive squares in 4 ways, for example, as 3030680583225 + 17092320729796 = 1740885^2 + 4134286^2 .

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 20123001313021 - 2⁵ = 20123001312989 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 20123001313021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123001313621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169895710 + ... + 170014111.

It is an arithmetic number, because the mean of its divisors is an integer number (2565129471723).

Almost surely, 2^{20123001313021} is an apocalyptic number.

It is an amenable number.

20123001313021 is a deficient number, since it is larger than the sum of its proper divisors (398034460763).

20123001313021 is a wasteful number, since it uses less digits than its factorization.

20123001313021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339910991.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 20123001313021 its reverse (12031310032102), we get a palindrome (32154311345123).

The spelling of 20123001313021 in words is "twenty trillion, one hundred twenty-three billion, one million, three hundred thirteen thousand, twenty-one".