22245540205221 has 24 divisors (see below), whose sum is σ = 33530282200896. Its totient is φ = 14185235116800.

The previous prime is 22245540205183. The next prime is 22245540205249. The reversal of 22245540205221 is 12250204554222.

22245540205221 is a `hidden beast` number, since 2 + 2 + 2 + 45 + 540 + 2 + 0 + 52 + 21 = 666.

It is not a de Polignac number, because 22245540205221 - 2¹⁰ = 22245540204197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22245540205121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7934421 + ... + 10365621.

It is an arithmetic number, because the mean of its divisors is an integer number (1397095091704).

Almost surely, 2^{22245540205221} is an apocalyptic number.

It is an amenable number.

22245540205221 is a deficient number, since it is larger than the sum of its proper divisors (11284741995675).

22245540205221 is a wasteful number, since it uses less digits than its factorization.

22245540205221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2475433 (or 2475430 counting only the distinct ones).

The product of its (nonzero) digits is 128000, while the sum is 36.

Adding to 22245540205221 its reverse (12250204554222), we get a palindrome (34495744759443).

The spelling of 22245540205221 in words is "twenty-two trillion, two hundred forty-five billion, five hundred forty million, two hundred five thousand, two hundred twenty-one".