21323000331031 has 4 divisors (see below), whose sum is σ = 24369143235472. Its totient is φ = 18276857426592.

The previous prime is 21323000330993. The next prime is 21323000331049. The reversal of 21323000331031 is 13013300032312.

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 21323000331031 - 2¹⁵ = 21323000298263 is a prime.

It is a super-2 number, since 2×21323000331031² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21323000330993 and 21323000331011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21323000335031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1523071452210 + ... + 1523071452223.

It is an arithmetic number, because the mean of its divisors is an integer number (6092285808868).

Almost surely, 2^{21323000331031} is an apocalyptic number.

21323000331031 is a deficient number, since it is larger than the sum of its proper divisors (3046142904441).

21323000331031 is an equidigital number, since it uses as much as digits as its factorization.

21323000331031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3046142904440.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 21323000331031 its reverse (13013300032312), we get a palindrome (34336300363343).

The spelling of 21323000331031 in words is "twenty-one trillion, three hundred twenty-three billion, three hundred thirty-one thousand, thirty-one".