22205430042721 has 4 divisors (see below), whose sum is σ = 22207614981552. Its totient is φ = 22203245103892.

The previous prime is 22205430042709. The next prime is 22205430042751. The reversal of 22205430042721 is 12724003450222.

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 22205430042721 - 2⁹ = 22205430042209 is a prime.

It is a super-2 number, since 2×22205430042721² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22205430042751) 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, 1092454171 + ... + 1092474496.

It is an arithmetic number, because the mean of its divisors is an integer number (5551903745388).

Almost surely, 2^{22205430042721} is an apocalyptic number.

It is an amenable number.

22205430042721 is a deficient number, since it is larger than the sum of its proper divisors (2184938831).

22205430042721 is a wasteful number, since it uses less digits than its factorization.

22205430042721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2184938830.

The product of its (nonzero) digits is 53760, while the sum is 34.

Adding to 22205430042721 its reverse (12724003450222), we get a palindrome (34929433492943).

The spelling of 22205430042721 in words is "twenty-two trillion, two hundred five billion, four hundred thirty million, forty-two thousand, seven hundred twenty-one".