21213364634141 has 4 divisors (see below), whose sum is σ = 21213397266300. Its totient is φ = 21213332001984.

The previous prime is 21213364634129. The next prime is 21213364634159. The reversal of 21213364634141 is 14143646331212.

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 10524087487225 + 10689277146916 = 3244085^2 + 3269446^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21213364634141 is a prime.

It is a super-3 number, since 3×21213364634141³ (a number of 41 digits) contains 333 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 (21213364624141) 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, 15320726 + ... + 16647863.

It is an arithmetic number, because the mean of its divisors is an integer number (5303349316575).

Almost surely, 2^{21213364634141} is an apocalyptic number.

It is an amenable number.

21213364634141 is a deficient number, since it is larger than the sum of its proper divisors (32632159).

21213364634141 is an equidigital number, since it uses as much as digits as its factorization.

21213364634141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32632158.

The product of its digits is 248832, while the sum is 41.

The spelling of 21213364634141 in words is "twenty-one trillion, two hundred thirteen billion, three hundred sixty-four million, six hundred thirty-four thousand, one hundred forty-one".