20123013001231 has 24 divisors (see below), whose sum is σ = 23433562224864. Its totient is φ = 17229765147840.

The previous prime is 20123013001229. The next prime is 20123013001237. The reversal of 20123013001231 is 13210031032102.

It is not a de Polignac number, because 20123013001231 - 2¹ = 20123013001229 is a prime.

It is a super-2 number, since 2×20123013001231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20123013001199 and 20123013001208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20123013001237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 269805861 + ... + 269880433.

It is an arithmetic number, because the mean of its divisors is an integer number (976398426036).

Almost surely, 2^{20123013001231} is an apocalyptic number.

20123013001231 is a deficient number, since it is larger than the sum of its proper divisors (3310549223633).

20123013001231 is a wasteful number, since it uses less digits than its factorization.

20123013001231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80431 (or 80424 counting only the distinct ones).

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

Adding to 20123013001231 its reverse (13210031032102), we get a palindrome (33333044033333).

The spelling of 20123013001231 in words is "twenty trillion, one hundred twenty-three billion, thirteen million, one thousand, two hundred thirty-one".