21311230032101 has 4 divisors (see below), whose sum is σ = 22237805250912. Its totient is φ = 20384654813292.

The previous prime is 21311230032077. The next prime is 21311230032133. The reversal of 21311230032101 is 10123003211312.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21311230032101 - 2³⁸ = 21036352125157 is a prime.

It is a super-2 number, since 2×21311230032101² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21311230031101) 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, 463287609371 + ... + 463287609416.

It is an arithmetic number, because the mean of its divisors is an integer number (5559451312728).

Almost surely, 2^{21311230032101} is an apocalyptic number.

It is an amenable number.

21311230032101 is a deficient number, since it is larger than the sum of its proper divisors (926575218811).

21311230032101 is an equidigital number, since it uses as much as digits as its factorization.

21311230032101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 926575218810.

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

Adding to 21311230032101 its reverse (10123003211312), we get a palindrome (31434233243413).

The spelling of 21311230032101 in words is "twenty-one trillion, three hundred eleven billion, two hundred thirty million, thirty-two thousand, one hundred one".