21520523213041 has 8 divisors (see below), whose sum is σ = 21557406454560. Its totient is φ = 21483660951648.

The previous prime is 21520523213017. The next prime is 21520523213087. The reversal of 21520523213041 is 14031232502512.

It is a happy number.

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 21520523213041 - 2²³ = 21520514824433 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21520523212994 and 21520523213012.

It is not an unprimeable number, because it can be changed into a prime (21520523214041) 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, 3191071 + ... + 7295476.

It is an arithmetic number, because the mean of its divisors is an integer number (2694675806820).

Almost surely, 2^{21520523213041} is an apocalyptic number.

It is an amenable number.

21520523213041 is a deficient number, since it is larger than the sum of its proper divisors (36883241519).

21520523213041 is a wasteful number, since it uses less digits than its factorization.

21520523213041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10490063.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 21520523213041 its reverse (14031232502512), we get a palindrome (35551755715553).

The spelling of 21520523213041 in words is "twenty-one trillion, five hundred twenty billion, five hundred twenty-three million, two hundred thirteen thousand, forty-one".