21250241204513 has 8 divisors (see below), whose sum is σ = 22174255719936. Its totient is φ = 20326234271200.

The previous prime is 21250241204503. The next prime is 21250241204561. The reversal of 21250241204513 is 31540214205212.

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 21250241204513 - 2¹⁸ = 21250240942369 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21250241204513.

It is not an unprimeable number, because it can be changed into a prime (21250241204503) 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, 4256573 + ... + 7785813.

It is an arithmetic number, because the mean of its divisors is an integer number (2771781964992).

Almost surely, 2^{21250241204513} is an apocalyptic number.

21250241204513 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21250241204513 is a deficient number, since it is larger than the sum of its proper divisors (924014515423).

21250241204513 is a wasteful number, since it uses less digits than its factorization.

21250241204513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3791055.

The product of its (nonzero) digits is 19200, while the sum is 32.

Adding to 21250241204513 its reverse (31540214205212), we get a palindrome (52790455409725).

The spelling of 21250241204513 in words is "twenty-one trillion, two hundred fifty billion, two hundred forty-one million, two hundred four thousand, five hundred thirteen".