20101111210223 has 4 divisors (see below), whose sum is σ = 20147534100288. Its totient is φ = 20054688320160.

The previous prime is 20101111210217. The next prime is 20101111210247. The reversal of 20101111210223 is 32201211110102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20101111210223 - 2³² = 20096816242927 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 (20101111210253) 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, 23211444383 + ... + 23211445248.

It is an arithmetic number, because the mean of its divisors is an integer number (5036883525072).

Almost surely, 2^{20101111210223} is an apocalyptic number.

20101111210223 is a deficient number, since it is larger than the sum of its proper divisors (46422890065).

20101111210223 is an equidigital number, since it uses as much as digits as its factorization.

20101111210223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46422890064.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 20101111210223 its reverse (32201211110102), we get a palindrome (52302322320325).

The spelling of 20101111210223 in words is "twenty trillion, one hundred one billion, one hundred eleven million, two hundred ten thousand, two hundred twenty-three".