21323113101 has 12 divisors (see below), whose sum is σ = 30801322812. Its totient is φ = 14214822336.

The previous prime is 21323113027. The next prime is 21323113103. The reversal of 21323113101 is 10131132312.

21323113101 is a `hidden beast` number, since 21 + 323 + 11 + 310 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 19349088201 + 1974024900 = 139101^2 + 44430^2 .

It is not a de Polignac number, because 21323113101 - 2⁷ = 21323112973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21323113103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 374235 + ... + 427431.

It is an arithmetic number, because the mean of its divisors is an integer number (2566776901).

Almost surely, 2^21323113101 is an apocalyptic number.

It is an amenable number.

21323113101 is a deficient number, since it is larger than the sum of its proper divisors (9478209711).

21323113101 is a wasteful number, since it uses less digits than its factorization.

21323113101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97740 (or 97737 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 21323113101 its reverse (10131132312), we get a palindrome (31454245413).

The spelling of 21323113101 in words is "twenty-one billion, three hundred twenty-three million, one hundred thirteen thousand, one hundred one".