22125040521521 has 16 divisors (see below), whose sum is σ = 25361476208640. Its totient is φ = 18907536775680.

The previous prime is 22125040521509. The next prime is 22125040521539. The reversal of 22125040521521 is 12512504052122.

It is a de Polignac number, because none of the positive numbers 2^k-22125040521521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22125040521421) 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, 106430960 + ... + 106638638.

It is an arithmetic number, because the mean of its divisors is an integer number (1585092263040).

Almost surely, 2^{22125040521521} is an apocalyptic number.

It is an amenable number.

22125040521521 is a deficient number, since it is larger than the sum of its proper divisors (3236435687119).

22125040521521 is a wasteful number, since it uses less digits than its factorization.

22125040521521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253184.

The product of its (nonzero) digits is 16000, while the sum is 32.

Adding to 22125040521521 its reverse (12512504052122), we get a palindrome (34637544573643).

The spelling of 22125040521521 in words is "twenty-two trillion, one hundred twenty-five billion, forty million, five hundred twenty-one thousand, five hundred twenty-one".