21101010313 has 8 divisors (see below), whose sum is σ = 22153531968. Its totient is φ = 20059745904.

The previous prime is 21101010251. The next prime is 21101010341. The reversal of 21101010313 is 31301010112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21101010313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21101010293 and 21101010302.

It is not an unprimeable number, because it can be changed into a prime (21101010373) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2810470 + ... + 2817967.

It is an arithmetic number, because the mean of its divisors is an integer number (2769191496).

Almost surely, 2^21101010313 is an apocalyptic number.

21101010313 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21101010313 is a deficient number, since it is larger than the sum of its proper divisors (1052521655).

21101010313 is a wasteful number, since it uses less digits than its factorization.

21101010313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5628623.

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 21101010313 its reverse (31301010112), we get a palindrome (52402020425).

The spelling of 21101010313 in words is "twenty-one billion, one hundred one million, ten thousand, three hundred thirteen".