21232003101 has 4 divisors (see below), whose sum is σ = 28309337472. Its totient is φ = 14154668732.

The previous prime is 21232003099. The next prime is 21232003127. The reversal of 21232003101 is 10130023212.

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 21232003101 - 2¹ = 21232003099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21232003601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3538667181 + ... + 3538667186.

It is an arithmetic number, because the mean of its divisors is an integer number (7077334368).

Almost surely, 2^21232003101 is an apocalyptic number.

It is an amenable number.

21232003101 is a deficient number, since it is larger than the sum of its proper divisors (7077334371).

21232003101 is an equidigital number, since it uses as much as digits as its factorization.

21232003101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7077334370.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21232003101 its reverse (10130023212), we get a palindrome (31362026313).

The spelling of 21232003101 in words is "twenty-one billion, two hundred thirty-two million, three thousand, one hundred one".