31211030020231 has 2 divisors, whose sum is σ = 31211030020232. Its totient is φ = 31211030020230.

The previous prime is 31211030020201. The next prime is 31211030020249. The reversal of 31211030020231 is 13202003011213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31211030020231 - 2³⁷ = 31073591066759 is a prime.

It is a super-2 number, since 2×31211030020231² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31211030020199 and 31211030020208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31211030020201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15605515010115 + 15605515010116.

It is an arithmetic number, because the mean of its divisors is an integer number (15605515010116).

Almost surely, 2^{31211030020231} is an apocalyptic number.

31211030020231 is a deficient number, since it is larger than the sum of its proper divisors (1).

31211030020231 is an equidigital number, since it uses as much as digits as its factorization.

31211030020231 is an evil number, because the sum of its binary digits is even.

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

Adding to 31211030020231 its reverse (13202003011213), we get a palindrome (44413033031444).

The spelling of 31211030020231 in words is "thirty-one trillion, two hundred eleven billion, thirty million, twenty thousand, two hundred thirty-one".