21223425601 has 8 divisors (see below), whose sum is σ = 24258878784. Its totient is φ = 18188856240.

The previous prime is 21223425563. The next prime is 21223425611. The reversal of 21223425601 is 10652432212.

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

It is a cyclic number.

It is not a de Polignac number, because 21223425601 - 2⁹ = 21223425089 is a prime.

It is a super-2 number, since 2×21223425601² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21223425601.

It is not an unprimeable number, because it can be changed into a prime (21223425611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168670 + ... + 266263.

It is an arithmetic number, because the mean of its divisors is an integer number (3032359848).

Almost surely, 2^21223425601 is an apocalyptic number.

It is an amenable number.

21223425601 is a deficient number, since it is larger than the sum of its proper divisors (3035453183).

21223425601 is an equidigital number, since it uses as much as digits as its factorization.

21223425601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441911.

The product of its (nonzero) digits is 5760, while the sum is 28.

Adding to 21223425601 its reverse (10652432212), we get a palindrome (31875857813).

The spelling of 21223425601 in words is "twenty-one billion, two hundred twenty-three million, four hundred twenty-five thousand, six hundred one".