24220121221 has 8 divisors (see below), whose sum is σ = 25728373440. Its totient is φ = 22721151168.

The previous prime is 24220121209. The next prime is 24220121239. The reversal of 24220121221 is 12212102242.

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

It is not a de Polignac number, because 24220121221 - 2²³ = 24211732613 is a prime.

It is a super-2 number, since 2×24220121221² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (24230121221) 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, 2315161 + ... + 2325598.

It is an arithmetic number, because the mean of its divisors is an integer number (3216046680).

Almost surely, 2^24220121221 is an apocalyptic number.

It is an amenable number.

24220121221 is a deficient number, since it is larger than the sum of its proper divisors (1508252219).

24220121221 is a wasteful number, since it uses less digits than its factorization.

24220121221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4641083.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 24220121221 its reverse (12212102242), we get a palindrome (36432223463).

The spelling of 24220121221 in words is "twenty-four billion, two hundred twenty million, one hundred twenty-one thousand, two hundred twenty-one".