221125215146 has 16 divisors (see below), whose sum is σ = 361854978048. Its totient is φ = 100507651200.

The previous prime is 221125215119. The next prime is 221125215169. The reversal of 221125215146 is 641512521122.

221125215146 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 451031 + ... + 803541.

It is an arithmetic number, because the mean of its divisors is an integer number (22615936128).

Almost surely, 2^221125215146 is an apocalyptic number.

221125215146 is a deficient number, since it is larger than the sum of its proper divisors (140729762902).

221125215146 is a wasteful number, since it uses less digits than its factorization.

221125215146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381037.

The product of its digits is 9600, while the sum is 32.

Adding to 221125215146 its reverse (641512521122), we get a palindrome (862637736268).

The spelling of 221125215146 in words is "two hundred twenty-one billion, one hundred twenty-five million, two hundred fifteen thousand, one hundred forty-six".