21232123601 has 16 divisors (see below), whose sum is σ = 23023332864. Its totient is φ = 19463670144.

The previous prime is 21232123571. The next prime is 21232123609. The reversal of 21232123601 is 10632123212.

It is a cyclic number.

It is not a de Polignac number, because 21232123601 - 2⁶ = 21232123537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21232123609) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3508160 + ... + 3514206.

It is an arithmetic number, because the mean of its divisors is an integer number (1438958304).

Almost surely, 2^21232123601 is an apocalyptic number.

It is an amenable number.

21232123601 is a deficient number, since it is larger than the sum of its proper divisors (1791209263).

21232123601 is a wasteful number, since it uses less digits than its factorization.

21232123601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7880.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 21232123601 its reverse (10632123212), we get a palindrome (31864246813).

The spelling of 21232123601 in words is "twenty-one billion, two hundred thirty-two million, one hundred twenty-three thousand, six hundred one".