21433012411231 has 4 divisors (see below), whose sum is σ = 21433235116464. Its totient is φ = 21432789706000.

The previous prime is 21433012411229. The next prime is 21433012411319. The reversal of 21433012411231 is 13211421033412.

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 21433012411231 - 2¹ = 21433012411229 is a prime.

It is a super-2 number, since 2×21433012411231² (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 21433012411231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21433012471231) 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, 111208195 + ... + 111400756.

It is an arithmetic number, because the mean of its divisors is an integer number (5358308779116).

Almost surely, 2^{21433012411231} is an apocalyptic number.

21433012411231 is a deficient number, since it is larger than the sum of its proper divisors (222705233).

21433012411231 is an equidigital number, since it uses as much as digits as its factorization.

21433012411231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222705232.

The product of its (nonzero) digits is 3456, while the sum is 28.

Adding to 21433012411231 its reverse (13211421033412), we get a palindrome (34644433444643).

The spelling of 21433012411231 in words is "twenty-one trillion, four hundred thirty-three billion, twelve million, four hundred eleven thousand, two hundred thirty-one".