21323112121301 has 8 divisors (see below), whose sum is σ = 21332742240600. Its totient is φ = 21313482607872.

The previous prime is 21323112121271. The next prime is 21323112121313. The reversal of 21323112121301 is 10312121132312.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 198951025 + 21322913170276 = 14105^2 + 4617674^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21323112121301 is a prime.

It is a super-2 number, since 2×21323112121301² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21323112121331) 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, 79670561 + ... + 79937753.

It is an arithmetic number, because the mean of its divisors is an integer number (2666592780075).

Almost surely, 2^{21323112121301} is an apocalyptic number.

It is an amenable number.

21323112121301 is a deficient number, since it is larger than the sum of its proper divisors (9630119299).

21323112121301 is a wasteful number, since it uses less digits than its factorization.

21323112121301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302935.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 21323112121301 its reverse (10312121132312), we get a palindrome (31635233253613).

The spelling of 21323112121301 in words is "twenty-one trillion, three hundred twenty-three billion, one hundred twelve million, one hundred twenty-one thousand, three hundred one".