21112111311301 has 4 divisors (see below), whose sum is σ = 21119659441132. Its totient is φ = 21104563181472.

The previous prime is 21112111311241. The next prime is 21112111311353. The reversal of 21112111311301 is 10311311121112.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5670237263076 + 15441874048225 = 2381226^2 + 3929615^2 .

It is a cyclic number.

It is not a de Polignac number, because 21112111311301 - 2²⁷ = 21111977093573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21112111311391) 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, 3774060720 + ... + 3774066313.

It is an arithmetic number, because the mean of its divisors is an integer number (5279914860283).

Almost surely, 2^{21112111311301} is an apocalyptic number.

It is an amenable number.

21112111311301 is a deficient number, since it is larger than the sum of its proper divisors (7548129831).

21112111311301 is an equidigital number, since it uses as much as digits as its factorization.

21112111311301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7548129830.

The product of its (nonzero) digits is 36, while the sum is 19.

Adding to 21112111311301 its reverse (10311311121112), we get a palindrome (31423422432413).

The spelling of 21112111311301 in words is "twenty-one trillion, one hundred twelve billion, one hundred eleven million, three hundred eleven thousand, three hundred one".