21100300223213 has 4 divisors (see below), whose sum is σ = 22017704580768. Its totient is φ = 20182895865660.

The previous prime is 21100300223173. The next prime is 21100300223251. The reversal of 21100300223213 is 31232200300112.

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 21100300223213 - 2³² = 21096005255917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100300223713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 458702178743 + ... + 458702178788.

It is an arithmetic number, because the mean of its divisors is an integer number (5504426145192).

Almost surely, 2^{21100300223213} is an apocalyptic number.

21100300223213 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21100300223213 is a deficient number, since it is larger than the sum of its proper divisors (917404357555).

21100300223213 is an equidigital number, since it uses as much as digits as its factorization.

21100300223213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 917404357554.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21100300223213 its reverse (31232200300112), we get a palindrome (52332500523325).

The spelling of 21100300223213 in words is "twenty-one trillion, one hundred billion, three hundred million, two hundred twenty-three thousand, two hundred thirteen".