221225121260 has 48 divisors (see below), whose sum is σ = 545791774752. Its totient is φ = 74257382400.

The previous prime is 221225121203. The next prime is 221225121269. The reversal of 221225121260 is 62121522122.

221225121260 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (221225121269) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 38672861 + ... + 38678580.

It is an arithmetic number, because the mean of its divisors is an integer number (11370661974).

Almost surely, 2^221225121260 is an apocalyptic number.

221225121260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221225121260 is an abundant number, since it is smaller than the sum of its proper divisors (324566653492).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221225121260 is a wasteful number, since it uses less digits than its factorization.

221225121260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77351474 (or 77351472 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

Adding to 221225121260 its reverse (62121522122), we get a palindrome (283346643382).

The spelling of 221225121260 in words is "two hundred twenty-one billion, two hundred twenty-five million, one hundred twenty-one thousand, two hundred sixty".