21323332201531 has 2 divisors, whose sum is σ = 21323332201532. Its totient is φ = 21323332201530.

The previous prime is 21323332201511. The next prime is 21323332201571. The reversal of 21323332201531 is 13510223332312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21323332201531 - 2¹⁵ = 21323332168763 is a prime.

It is a super-2 number, since 2×21323332201531² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21323332201493 and 21323332201502.

It is not a weakly prime, because it can be changed into another prime (21323332201511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10661666100765 + 10661666100766.

It is an arithmetic number, because the mean of its divisors is an integer number (10661666100766).

Almost surely, 2^{21323332201531} is an apocalyptic number.

21323332201531 is a deficient number, since it is larger than the sum of its proper divisors (1).

21323332201531 is an equidigital number, since it uses as much as digits as its factorization.

21323332201531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 31.

Adding to 21323332201531 its reverse (13510223332312), we get a palindrome (34833555533843).

The spelling of 21323332201531 in words is "twenty-one trillion, three hundred twenty-three billion, three hundred thirty-two million, two hundred one thousand, five hundred thirty-one".