21213545104041 has 8 divisors (see below), whose sum is σ = 28286435608800. Its totient is φ = 14141509000992.

The previous prime is 21213545103991. The next prime is 21213545104061. The reversal of 21213545104041 is 14040154531212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21213545104041 - 2²¹ = 21213543006889 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21213545103993 and 21213545104011.

It is not an unprimeable number, because it can be changed into a prime (21213545104061) 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 7 ways as a sum of consecutive naturals, for example, 213542491 + ... + 213641808.

It is an arithmetic number, because the mean of its divisors is an integer number (3535804451100).

Almost surely, 2^{21213545104041} is an apocalyptic number.

It is an amenable number.

21213545104041 is a deficient number, since it is larger than the sum of its proper divisors (7072890504759).

21213545104041 is a wasteful number, since it uses less digits than its factorization.

21213545104041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427200855.

The product of its (nonzero) digits is 19200, while the sum is 33.

Adding to 21213545104041 its reverse (14040154531212), we get a palindrome (35253699635253).

The spelling of 21213545104041 in words is "twenty-one trillion, two hundred thirteen billion, five hundred forty-five million, one hundred four thousand, forty-one".