21312330101 has 4 divisors (see below), whose sum is σ = 21407901312. Its totient is φ = 21216758892.

The previous prime is 21312330049. The next prime is 21312330113. The reversal of 21312330101 is 10103321312.

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 21312330101 - 2⁶ = 21312330037 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 21312330101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21312330601) 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, 47785271 + ... + 47785716.

It is an arithmetic number, because the mean of its divisors is an integer number (5351975328).

Almost surely, 2^21312330101 is an apocalyptic number.

It is an amenable number.

21312330101 is a deficient number, since it is larger than the sum of its proper divisors (95571211).

21312330101 is an equidigital number, since it uses as much as digits as its factorization.

21312330101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95571210.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21312330101 its reverse (10103321312), we get a palindrome (31415651413).

The spelling of 21312330101 in words is "twenty-one billion, three hundred twelve million, three hundred thirty thousand, one hundred one".