21012100011301 has 4 divisors (see below), whose sum is σ = 24013828584352. Its totient is φ = 18010371438252.

The previous prime is 21012100011299. The next prime is 21012100011313. The reversal of 21012100011301 is 10311000121012.

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 21012100011301 - 2¹ = 21012100011299 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 (21012100011601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1500864286515 + ... + 1500864286528.

It is an arithmetic number, because the mean of its divisors is an integer number (6003457146088).

Almost surely, 2^{21012100011301} is an apocalyptic number.

It is an amenable number.

21012100011301 is a deficient number, since it is larger than the sum of its proper divisors (3001728573051).

21012100011301 is an equidigital number, since it uses as much as digits as its factorization.

21012100011301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3001728573050.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 21012100011301 its reverse (10311000121012), we get a palindrome (31323100132313).

The spelling of 21012100011301 in words is "twenty-one trillion, twelve billion, one hundred million, eleven thousand, three hundred one".