21323332201231 has 16 divisors (see below), whose sum is σ = 22068739732480. Its totient is φ = 20594098990080.

The previous prime is 21323332201169. The next prime is 21323332201277. The reversal of 21323332201231 is 13210223332312.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21323332201231 - 2³³ = 21314742266639 is a prime.

It is a super-2 number, since 2×21323332201231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21323332201231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21323332201531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13436496 + ... + 14939413.

It is an arithmetic number, because the mean of its divisors is an integer number (1379296233280).

Almost surely, 2^{21323332201231} is an apocalyptic number.

21323332201231 is a deficient number, since it is larger than the sum of its proper divisors (745407531249).

21323332201231 is a wasteful number, since it uses less digits than its factorization.

21323332201231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28376194.

The product of its (nonzero) digits is 7776, while the sum is 28.

Adding to 21323332201231 its reverse (13210223332312), we get a palindrome (34533555533543).

The spelling of 21323332201231 in words is "twenty-one trillion, three hundred twenty-three billion, three hundred thirty-two million, two hundred one thousand, two hundred thirty-one".