22121242004441 has 16 divisors (see below), whose sum is σ = 24230448118800. Its totient is φ = 20101825701888.

The previous prime is 22121242004429. The next prime is 22121242004531. The reversal of 22121242004441 is 14440024212122.

It can be written as a sum of positive squares in 8 ways, for example, as 1590411043225 + 20530830961216 = 1261115^2 + 4531096^2 .

It is a cyclic number.

It is not a de Polignac number, because 22121242004441 - 2¹⁴ = 22121241988057 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22121242004401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52468565 + ... + 52888493.

It is an arithmetic number, because the mean of its divisors is an integer number (1514403007425).

Almost surely, 2^{22121242004441} is an apocalyptic number.

It is an amenable number.

22121242004441 is a deficient number, since it is larger than the sum of its proper divisors (2109206114359).

22121242004441 is a wasteful number, since it uses less digits than its factorization.

22121242004441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526828.

The product of its (nonzero) digits is 8192, while the sum is 29.

Adding to 22121242004441 its reverse (14440024212122), we get a palindrome (36561266216563).

The spelling of 22121242004441 in words is "twenty-two trillion, one hundred twenty-one billion, two hundred forty-two million, four thousand, four hundred forty-one".