21111210232301 has 24 divisors (see below), whose sum is σ = 24626605481856. Its totient is φ = 18044733329280.

The previous prime is 21111210232253. The next prime is 21111210232309. The reversal of 21111210232301 is 10323201211112.

It is a de Polignac number, because none of the positive numbers 2^k-21111210232301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21111210232309) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 321701045 + ... + 321766661.

It is an arithmetic number, because the mean of its divisors is an integer number (1026108561744).

Almost surely, 2^{21111210232301} is an apocalyptic number.

It is an amenable number.

21111210232301 is a deficient number, since it is larger than the sum of its proper divisors (3515395249555).

21111210232301 is a wasteful number, since it uses less digits than its factorization.

21111210232301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83889 (or 83882 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 21111210232301 its reverse (10323201211112), we get a palindrome (31434411443413).

The spelling of 21111210232301 in words is "twenty-one trillion, one hundred eleven billion, two hundred ten million, two hundred thirty-two thousand, three hundred one".