21013202030231 has 2 divisors, whose sum is σ = 21013202030232. Its totient is φ = 21013202030230.

The previous prime is 21013202030147. The next prime is 21013202030239. The reversal of 21013202030231 is 13203020231012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21013202030231 - 2¹⁴ = 21013202013847 is a prime.

It is a super-2 number, since 2×21013202030231² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21013202030239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10506601015115 + 10506601015116.

It is an arithmetic number, because the mean of its divisors is an integer number (10506601015116).

Almost surely, 2^{21013202030231} is an apocalyptic number.

21013202030231 is a deficient number, since it is larger than the sum of its proper divisors (1).

21013202030231 is an equidigital number, since it uses as much as digits as its factorization.

21013202030231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21013202030231 its reverse (13203020231012), we get a palindrome (34216222261243).

The spelling of 21013202030231 in words is "twenty-one trillion, thirteen billion, two hundred two million, thirty thousand, two hundred thirty-one".