21213600125606 has 32 divisors (see below), whose sum is σ = 38969278225920. Its totient is φ = 8453652932736.

The previous prime is 21213600125591. The next prime is 21213600125609. The reversal of 21213600125606 is 60652100631212.

It is a super-2 number, since 2×21213600125606² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21213600125609) 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, 536924666 + ... + 536964173.

It is an arithmetic number, because the mean of its divisors is an integer number (1217789944560).

Almost surely, 2^{21213600125606} is an apocalyptic number.

21213600125606 is a deficient number, since it is larger than the sum of its proper divisors (17755678100314).

21213600125606 is a wasteful number, since it uses less digits than its factorization.

21213600125606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1073888948.

The product of its (nonzero) digits is 25920, while the sum is 35.

Adding to 21213600125606 its reverse (60652100631212), we get a palindrome (81865700756818).

The spelling of 21213600125606 in words is "twenty-one trillion, two hundred thirteen billion, six hundred million, one hundred twenty-five thousand, six hundred six".