21323331440031 has 8 divisors (see below), whose sum is σ = 28433561070640. Its totient is φ = 14214328051392.

The previous prime is 21323331440029. The next prime is 21323331440041. The reversal of 21323331440031 is 13004413332312.

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

It is not a de Polignac number, because 21323331440031 - 2¹ = 21323331440029 is a prime.

It is a super-2 number, since 2×21323331440031² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21323331440041) 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, 306519916 + ... + 306589473.

It is an arithmetic number, because the mean of its divisors is an integer number (3554195133830).

Almost surely, 2^{21323331440031} is an apocalyptic number.

21323331440031 is a deficient number, since it is larger than the sum of its proper divisors (7110229630609).

21323331440031 is a wasteful number, since it uses less digits than its factorization.

21323331440031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613120985.

The product of its (nonzero) digits is 15552, while the sum is 30.

Adding to 21323331440031 its reverse (13004413332312), we get a palindrome (34327744772343).

The spelling of 21323331440031 in words is "twenty-one trillion, three hundred twenty-three billion, three hundred thirty-one million, four hundred forty thousand, thirty-one".