21011532052541 has 8 divisors (see below), whose sum is σ = 21238443471168. Its totient is φ = 20785775400000.

The previous prime is 21011532052529. The next prime is 21011532052547. The reversal of 21011532052541 is 14525023511012.

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

It is a cyclic number.

It is not a de Polignac number, because 21011532052541 - 2¹⁸ = 21011531790397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21011532052498 and 21011532052507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21011532052547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 288654935 + ... + 288727716.

It is an arithmetic number, because the mean of its divisors is an integer number (2654805433896).

Almost surely, 2^{21011532052541} is an apocalyptic number.

It is an amenable number.

21011532052541 is a deficient number, since it is larger than the sum of its proper divisors (226911418627).

21011532052541 is a wasteful number, since it uses less digits than its factorization.

21011532052541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577383043.

The product of its (nonzero) digits is 12000, while the sum is 32.

Adding to 21011532052541 its reverse (14525023511012), we get a palindrome (35536555563553).

The spelling of 21011532052541 in words is "twenty-one trillion, eleven billion, five hundred thirty-two million, fifty-two thousand, five hundred forty-one".