21141052403213 has 4 divisors (see below), whose sum is σ = 21141075958080. Its totient is φ = 21141028848348.

The previous prime is 21141052403209. The next prime is 21141052403291. The reversal of 21141052403213 is 31230425014112.

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 21141052403213 - 2² = 21141052403209 is a prime.

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 (21141052903213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10375523 + ... + 12244736.

It is an arithmetic number, because the mean of its divisors is an integer number (5285268989520).

Almost surely, 2^{21141052403213} is an apocalyptic number.

It is an amenable number.

21141052403213 is a deficient number, since it is larger than the sum of its proper divisors (23554867).

21141052403213 is an equidigital number, since it uses as much as digits as its factorization.

21141052403213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23554866.

The product of its (nonzero) digits is 5760, while the sum is 29.

Adding to 21141052403213 its reverse (31230425014112), we get a palindrome (52371477417325).

The spelling of 21141052403213 in words is "twenty-one trillion, one hundred forty-one billion, fifty-two million, four hundred three thousand, two hundred thirteen".