21100203222313 has 4 divisors (see below), whose sum is σ = 21100219822080. Its totient is φ = 21100186622548.

The previous prime is 21100203222247. The next prime is 21100203222341. The reversal of 21100203222313 is 31322230200112.

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 21100203222313 - 2²¹ = 21100201125161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21100203022313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6219373 + ... + 8993386.

It is an arithmetic number, because the mean of its divisors is an integer number (5275054955520).

Almost surely, 2^{21100203222313} is an apocalyptic number.

It is an amenable number.

21100203222313 is a deficient number, since it is larger than the sum of its proper divisors (16599767).

21100203222313 is a wasteful number, since it uses less digits than its factorization.

21100203222313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16599766.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21100203222313 its reverse (31322230200112), we get a palindrome (52422433422425).

The spelling of 21100203222313 in words is "twenty-one trillion, one hundred billion, two hundred three million, two hundred twenty-two thousand, three hundred thirteen".