21322131310031 has 4 divisors (see below), whose sum is σ = 21337570943064. Its totient is φ = 21306691677000.

The previous prime is 21322131310013. The next prime is 21322131310037. The reversal of 21322131310031 is 13001313122312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21322131310031 - 2²² = 21322127115727 is a prime.

It is a super-2 number, since 2×21322131310031² (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 = 21322131309979 and 21322131310006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21322131310037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7719814445 + ... + 7719817206.

It is an arithmetic number, because the mean of its divisors is an integer number (5334392735766).

Almost surely, 2^{21322131310031} is an apocalyptic number.

21322131310031 is a deficient number, since it is larger than the sum of its proper divisors (15439633033).

21322131310031 is a wasteful number, since it uses less digits than its factorization.

21322131310031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15439633032.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 21322131310031 its reverse (13001313122312), we get a palindrome (34323444432343).

The spelling of 21322131310031 in words is "twenty-one trillion, three hundred twenty-two billion, one hundred thirty-one million, three hundred ten thousand, thirty-one".