20203121001231 has 24 divisors (see below), whose sum is σ = 33352648569344. Its totient is φ = 11544133562640.

The previous prime is 20203121001227. The next prime is 20203121001269. The reversal of 20203121001231 is 13210012130202.

20203121001231 is a `hidden beast` number, since 2 + 0 + 20 + 312 + 100 + 1 + 231 = 666.

It is not a de Polignac number, because 20203121001231 - 2² = 20203121001227 is a prime.

It is a super-2 number, since 2×20203121001231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20203121001281) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5593555 + ... + 8467236.

Almost surely, 2^{20203121001231} is an apocalyptic number.

20203121001231 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20203121001231 is a deficient number, since it is larger than the sum of its proper divisors (13149527568113).

20203121001231 is a wasteful number, since it uses less digits than its factorization.

20203121001231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14083611 (or 14083608 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 20203121001231 its reverse (13210012130202), we get a palindrome (33413133131433).

The spelling of 20203121001231 in words is "twenty trillion, two hundred three billion, one hundred twenty-one million, one thousand, two hundred thirty-one".