21101303210231 has 4 divisors (see below), whose sum is σ = 21102993084432. Its totient is φ = 21099613336032.

The previous prime is 21101303210201. The next prime is 21101303210243. The reversal of 21101303210231 is 13201230310112.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21101303210231 - 2⁴² = 16703256699127 is a prime.

It is a super-2 number, since 2×21101303210231² (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 (21101303210201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 844918370 + ... + 844943343.

It is an arithmetic number, because the mean of its divisors is an integer number (5275748271108).

Almost surely, 2^{21101303210231} is an apocalyptic number.

21101303210231 is a deficient number, since it is larger than the sum of its proper divisors (1689874201).

21101303210231 is a wasteful number, since it uses less digits than its factorization.

21101303210231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1689874200.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 21101303210231 its reverse (13201230310112), we get a palindrome (34302533520343).

The spelling of 21101303210231 in words is "twenty-one trillion, one hundred one billion, three hundred three million, two hundred ten thousand, two hundred thirty-one".