1228250121 has 24 divisors (see below), whose sum is σ = 1908507744. Its totient is φ = 700580160.

The previous prime is 1228250081. The next prime is 1228250123. The reversal of 1228250121 is 1210528221.

It is not a de Polignac number, because 1228250121 - 2⁶ = 1228250057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1228250091 and 1228250100.

It is not an unprimeable number, because it can be changed into a prime (1228250123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76621 + ... + 91253.

It is an arithmetic number, because the mean of its divisors is an integer number (79521156).

Almost surely, 2^1228250121 is an apocalyptic number.

It is an amenable number.

1228250121 is a deficient number, since it is larger than the sum of its proper divisors (680257623).

1228250121 is a wasteful number, since it uses less digits than its factorization.

1228250121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15221 (or 15214 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 24.

The square root of 1228250121 is about 35046.3995440331. The cubic root of 1228250121 is about 1070.9329275780.

Adding to 1228250121 its reverse (1210528221), we get a palindrome (2438778342).

The spelling of 1228250121 in words is "one billion, two hundred twenty-eight million, two hundred fifty thousand, one hundred twenty-one".