21324221244121 has 8 divisors (see below), whose sum is σ = 21351678828480. Its totient is φ = 21296765420688.

The previous prime is 21324221244101. The next prime is 21324221244167. The reversal of 21324221244121 is 12144212242312.

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 21324221244121 - 2⁹ = 21324221243609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21324221244101) 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, 24718900 + ... + 25567018.

It is an arithmetic number, because the mean of its divisors is an integer number (2668959853560).

Almost surely, 2^{21324221244121} is an apocalyptic number.

It is an amenable number.

21324221244121 is a deficient number, since it is larger than the sum of its proper divisors (27457584359).

21324221244121 is an equidigital number, since it uses as much as digits as its factorization.

21324221244121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 880463.

The product of its digits is 12288, while the sum is 31.

Adding to 21324221244121 its reverse (12144212242312), we get a palindrome (33468433486433).

The spelling of 21324221244121 in words is "twenty-one trillion, three hundred twenty-four billion, two hundred twenty-one million, two hundred forty-four thousand, one hundred twenty-one".