21322535401 has 4 divisors (see below), whose sum is σ = 21434171904. Its totient is φ = 21210898900.

The previous prime is 21322535387. The next prime is 21322535453. The reversal of 21322535401 is 10453522312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21322535401 - 2¹⁷ = 21322404329 is a prime.

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 21322535401.

It is not an unprimeable number, because it can be changed into a prime (21322535501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55817965 + ... + 55818346.

It is an arithmetic number, because the mean of its divisors is an integer number (5358542976).

Almost surely, 2^21322535401 is an apocalyptic number.

It is an amenable number.

21322535401 is a deficient number, since it is larger than the sum of its proper divisors (111636503).

21322535401 is a wasteful number, since it uses less digits than its factorization.

21322535401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111636502.

The product of its (nonzero) digits is 7200, while the sum is 28.

The spelling of 21322535401 in words is "twenty-one billion, three hundred twenty-two million, five hundred thirty-five thousand, four hundred one".