21602350433261 has 8 divisors (see below), whose sum is σ = 23266442992800. Its totient is φ = 19938596915952.

The previous prime is 21602350433197. The next prime is 21602350433317. The reversal of 21602350433261 is 16233405320612.

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

It is not a de Polignac number, because 21602350433261 - 2⁶ = 21602350433197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21602350432261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84628211 + ... + 84883088.

It is an arithmetic number, because the mean of its divisors is an integer number (2908305374100).

Almost surely, 2^{21602350433261} is an apocalyptic number.

It is an amenable number.

21602350433261 is a deficient number, since it is larger than the sum of its proper divisors (1664092559539).

21602350433261 is a wasteful number, since it uses less digits than its factorization.

21602350433261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169521115.

The product of its (nonzero) digits is 155520, while the sum is 38.

Adding to 21602350433261 its reverse (16233405320612), we get a palindrome (37835755753873).

The spelling of 21602350433261 in words is "twenty-one trillion, six hundred two billion, three hundred fifty million, four hundred thirty-three thousand, two hundred sixty-one".