21011210210223 has 8 divisors (see below), whose sum is σ = 31127718830000. Its totient is φ = 14007473473464.

The previous prime is 21011210210201. The next prime is 21011210210231. The reversal of 21011210210223 is 32201201211012.

21011210210223 is a `hidden beast` number, since 2 + 10 + 11 + 210 + 210 + 223 = 666.

It is not a de Polignac number, because 21011210210223 - 2⁹ = 21011210209711 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21011210210196 and 21011210210205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21011210210323) 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 7 ways as a sum of consecutive naturals, for example, 389096485348 + ... + 389096485401.

It is an arithmetic number, because the mean of its divisors is an integer number (3890964853750).

Almost surely, 2^{21011210210223} is an apocalyptic number.

21011210210223 is a deficient number, since it is larger than the sum of its proper divisors (10116508619777).

21011210210223 is an equidigital number, since it uses as much as digits as its factorization.

21011210210223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778192970758 (or 778192970752 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 21011210210223 its reverse (32201201211012), we get a palindrome (53212411421235).

The spelling of 21011210210223 in words is "twenty-one trillion, eleven billion, two hundred ten million, two hundred ten thousand, two hundred twenty-three".