21232126601 has 8 divisors (see below), whose sum is σ = 24272846784. Its totient is φ = 18193296240.

The previous prime is 21232126561. The next prime is 21232126633. The reversal of 21232126601 is 10662123212.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-21232126601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21232126681) 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, 448295 + ... + 493388.

It is an arithmetic number, because the mean of its divisors is an integer number (3034105848).

Almost surely, 2^21232126601 is an apocalyptic number.

It is an amenable number.

21232126601 is a deficient number, since it is larger than the sum of its proper divisors (3040720183).

21232126601 is an equidigital number, since it uses as much as digits as its factorization.

21232126601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944911.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 21232126601 its reverse (10662123212), we get a palindrome (31894249813).

The spelling of 21232126601 in words is "twenty-one billion, two hundred thirty-two million, one hundred twenty-six thousand, six hundred one".