21011320012023 has 12 divisors (see below), whose sum is σ = 33108746685768. Its totient is φ = 12734133340560.

The previous prime is 21011320012013. The next prime is 21011320012093. The reversal of 21011320012023 is 32021002311012.

21011320012023 is a `hidden beast` number, since 210 + 11 + 320 + 0 + 120 + 2 + 3 = 666.

It is not a de Polignac number, because 21011320012023 - 2⁵ = 21011320011991 is a prime.

It is a super-3 number, since 3×21011320012023³ (a number of 41 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21011320011987 and 21011320012005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21011320012003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 106117777740 + ... + 106117777937.

It is an arithmetic number, because the mean of its divisors is an integer number (2759062223814).

Almost surely, 2^{21011320012023} is an apocalyptic number.

21011320012023 is a deficient number, since it is larger than the sum of its proper divisors (12097426673745).

21011320012023 is a wasteful number, since it uses less digits than its factorization.

21011320012023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212235555694 (or 212235555691 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21011320012023 its reverse (32021002311012), we get a palindrome (53032322323035).

The spelling of 21011320012023 in words is "twenty-one trillion, eleven billion, three hundred twenty million, twelve thousand, twenty-three".