22104331145521 has 4 divisors (see below), whose sum is σ = 22104868834852. Its totient is φ = 22103793456192.

The previous prime is 22104331145419. The next prime is 22104331145531. The reversal of 22104331145521 is 12554113340122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18470869950625 + 3633461194896 = 4297775^2 + 1906164^2 .

It is a cyclic number.

It is not a de Polignac number, because 22104331145521 - 2¹⁵ = 22104331112753 is a prime.

It is a super-2 number, since 2×22104331145521² (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 (22104331145531) 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, 268782996 + ... + 268865221.

It is an arithmetic number, because the mean of its divisors is an integer number (5526217208713).

Almost surely, 2^{22104331145521} is an apocalyptic number.

It is an amenable number.

22104331145521 is a deficient number, since it is larger than the sum of its proper divisors (537689331).

22104331145521 is an equidigital number, since it uses as much as digits as its factorization.

22104331145521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537689330.

The product of its (nonzero) digits is 28800, while the sum is 34.

Adding to 22104331145521 its reverse (12554113340122), we get a palindrome (34658444485643).

The spelling of 22104331145521 in words is "twenty-two trillion, one hundred four billion, three hundred thirty-one million, one hundred forty-five thousand, five hundred twenty-one".