21231201130031 has 8 divisors (see below), whose sum is σ = 21241443573600. Its totient is φ = 21220960963680.

The previous prime is 21231201130021. The next prime is 21231201130043. The reversal of 21231201130031 is 13003110213212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21231201130031 - 2⁶ = 21231201129967 is a prime.

It is a super-2 number, since 2×21231201130031² (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 = 21231201129985 and 21231201130012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21231201130021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18231230 + ... + 19360788.

It is an arithmetic number, because the mean of its divisors is an integer number (2655180446700).

Almost surely, 2^{21231201130031} is an apocalyptic number.

21231201130031 is a deficient number, since it is larger than the sum of its proper divisors (10242443569).

21231201130031 is a wasteful number, since it uses less digits than its factorization.

21231201130031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1138609.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 21231201130031 its reverse (13003110213212), we get a palindrome (34234311343243).

The spelling of 21231201130031 in words is "twenty-one trillion, two hundred thirty-one billion, two hundred one million, one hundred thirty thousand, thirty-one".