21242312112031 has 8 divisors (see below), whose sum is σ = 22386359206400. Its totient is φ = 20100868084440.

The previous prime is 21242312112013. The next prime is 21242312112199. The reversal of 21242312112031 is 13021121324212.

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 21242312112031 - 2¹⁷ = 21242311980959 is a prime.

It is a super-2 number, since 2×21242312112031² (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 = 21242312111987 and 21242312112005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21242312110031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 650749935 + ... + 650782576.

It is an arithmetic number, because the mean of its divisors is an integer number (2798294900800).

Almost surely, 2^{21242312112031} is an apocalyptic number.

21242312112031 is a deficient number, since it is larger than the sum of its proper divisors (1144047094369).

21242312112031 is a wasteful number, since it uses less digits than its factorization.

21242312112031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1301533389.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 21242312112031 its reverse (13021121324212), we get a palindrome (34263433436243).

The spelling of 21242312112031 in words is "twenty-one trillion, two hundred forty-two billion, three hundred twelve million, one hundred twelve thousand, thirty-one".