22204040411521 has 4 divisors (see below), whose sum is σ = 22373536903344. Its totient is φ = 22034543919700.

The previous prime is 22204040411513. The next prime is 22204040411543. The reversal of 22204040411521 is 12511404040222.

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 22204040411521 - 2³ = 22204040411513 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 22204040411521.

It is not an unprimeable number, because it can be changed into a prime (22204040411551) 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, 84748245715 + ... + 84748245976.

It is an arithmetic number, because the mean of its divisors is an integer number (5593384225836).

Almost surely, 2^{22204040411521} is an apocalyptic number.

It is an amenable number.

22204040411521 is a deficient number, since it is larger than the sum of its proper divisors (169496491823).

22204040411521 is a wasteful number, since it uses less digits than its factorization.

22204040411521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169496491822.

The product of its (nonzero) digits is 5120, while the sum is 28.

Adding to 22204040411521 its reverse (12511404040222), we get a palindrome (34715444451743).

The spelling of 22204040411521 in words is "twenty-two trillion, two hundred four billion, forty million, four hundred eleven thousand, five hundred twenty-one".