24201221113421 has 4 divisors (see below), whose sum is σ = 26401332123744. Its totient is φ = 22001110103100.

The previous prime is 24201221113409. The next prime is 24201221113471. The reversal of 24201221113421 is 12431112210242.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 24201221113421 - 2²⁶ = 24201154004557 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 (24201221113471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1100055505145 + ... + 1100055505166.

It is an arithmetic number, because the mean of its divisors is an integer number (6600333030936).

Almost surely, 2^{24201221113421} is an apocalyptic number.

It is an amenable number.

24201221113421 is a deficient number, since it is larger than the sum of its proper divisors (2200111010323).

24201221113421 is a wasteful number, since it uses less digits than its factorization.

24201221113421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2200111010322.

The product of its (nonzero) digits is 1536, while the sum is 26.

Adding to 24201221113421 its reverse (12431112210242), we get a palindrome (36632333323663).

The spelling of 24201221113421 in words is "twenty-four trillion, two hundred one billion, two hundred twenty-one million, one hundred thirteen thousand, four hundred twenty-one".