21100234311023 has 8 divisors (see below), whose sum is σ = 24946089826080. Its totient is φ = 17462262877920.

The previous prime is 21100234311019. The next prime is 21100234311071. The reversal of 21100234311023 is 32011343200112.

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

It is not a de Polignac number, because 21100234311023 - 2² = 21100234311019 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21100234311023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100234311073) 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, 51971020268 + ... + 51971020673.

It is an arithmetic number, because the mean of its divisors is an integer number (3118261228260).

Almost surely, 2^{21100234311023} is an apocalyptic number.

21100234311023 is a deficient number, since it is larger than the sum of its proper divisors (3845855515057).

21100234311023 is a wasteful number, since it uses less digits than its factorization.

21100234311023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103942040977.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 21100234311023 its reverse (32011343200112), we get a palindrome (53111577511135).

The spelling of 21100234311023 in words is "twenty-one trillion, one hundred billion, two hundred thirty-four million, three hundred eleven thousand, twenty-three".