21010101201323 has 16 divisors (see below), whose sum is σ = 22711119772320. Its totient is φ = 19321224627456.

The previous prime is 21010101201307. The next prime is 21010101201377. The reversal of 21010101201323 is 32310210101012.

It is a cyclic number.

It is not a de Polignac number, because 21010101201323 - 2⁴ = 21010101201307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21010101201823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25591511 + ... + 26399727.

It is an arithmetic number, because the mean of its divisors is an integer number (1419444985770).

Almost surely, 2^{21010101201323} is an apocalyptic number.

21010101201323 is a deficient number, since it is larger than the sum of its proper divisors (1701018570997).

21010101201323 is a wasteful number, since it uses less digits than its factorization.

21010101201323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815726.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21010101201323 its reverse (32310210101012), we get a palindrome (53320311302335).

The spelling of 21010101201323 in words is "twenty-one trillion, ten billion, one hundred one million, two hundred one thousand, three hundred twenty-three".