21101310213 has 4 divisors (see below), whose sum is σ = 28135080288. Its totient is φ = 14067540140.

The previous prime is 21101310169. The next prime is 21101310253. The reversal of 21101310213 is 31201310112.

It is a happy number.

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 21101310213 - 2¹³ = 21101302021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21101310192 and 21101310201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101310253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3516885033 + ... + 3516885038.

It is an arithmetic number, because the mean of its divisors is an integer number (7033770072).

Almost surely, 2^21101310213 is an apocalyptic number.

It is an amenable number.

21101310213 is a deficient number, since it is larger than the sum of its proper divisors (7033770075).

21101310213 is an equidigital number, since it uses as much as digits as its factorization.

21101310213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7033770074.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 21101310213 its reverse (31201310112), we get a palindrome (52302620325).

The spelling of 21101310213 in words is "twenty-one billion, one hundred one million, three hundred ten thousand, two hundred thirteen".