20010031231 has 2 divisors, whose sum is σ = 20010031232. Its totient is φ = 20010031230.

The previous prime is 20010031199. The next prime is 20010031243. The reversal of 20010031231 is 13213001002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20010031231 - 2⁵ = 20010031199 is a prime.

It is a super-3 number, since 3×20010031231³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20010031031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005015615 + 10005015616.

It is an arithmetic number, because the mean of its divisors is an integer number (10005015616).

Almost surely, 2^20010031231 is an apocalyptic number.

20010031231 is a deficient number, since it is larger than the sum of its proper divisors (1).

20010031231 is an equidigital number, since it uses as much as digits as its factorization.

20010031231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 20010031231 its reverse (13213001002), we get a palindrome (33223032233).

The spelling of 20010031231 in words is "twenty billion, ten million, thirty-one thousand, two hundred thirty-one".