21012243401341 has 16 divisors (see below), whose sum is σ = 22633614615040. Its totient is φ = 19442463067440.

The previous prime is 21012243401329. The next prime is 21012243401371. The reversal of 21012243401341 is 14310434221012.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 21012243401341 - 2⁵ = 21012243401309 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 (21012243401371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16682536 + ... + 17897806.

It is an arithmetic number, because the mean of its divisors is an integer number (1414600913440).

Almost surely, 2^{21012243401341} is an apocalyptic number.

It is an amenable number.

21012243401341 is a deficient number, since it is larger than the sum of its proper divisors (1621371213699).

21012243401341 is a wasteful number, since it uses less digits than its factorization.

21012243401341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236496.

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 21012243401341 its reverse (14310434221012), we get a palindrome (35322677622353).

The spelling of 21012243401341 in words is "twenty-one trillion, twelve billion, two hundred forty-three million, four hundred one thousand, three hundred forty-one".