1222021125 has 48 divisors (see below), whose sum is σ = 2372378736. Its totient is φ = 601603200.

The previous prime is 1222021121. The next prime is 1222021133. The reversal of 1222021125 is 5211202221.

It can be written as a sum of positive squares in 8 ways, for example, as 211353444 + 1010667681 = 14538^2 + 31791^2 .

It is not a de Polignac number, because 1222021125 - 2² = 1222021121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1222021098 and 1222021107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222021121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 27154 + ... + 56403.

It is an arithmetic number, because the mean of its divisors is an integer number (49424557).

Almost surely, 2^1222021125 is an apocalyptic number.

1222021125 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1222021125 is a deficient number, since it is larger than the sum of its proper divisors (1150357611).

1222021125 is a wasteful number, since it uses less digits than its factorization.

1222021125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83591 (or 83578 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 1222021125 is about 34957.4187405192. The cubic root of 1222021125 is about 1069.1194680328.

Adding to 1222021125 its reverse (5211202221), we get a palindrome (6433223346).

The spelling of 1222021125 in words is "one billion, two hundred twenty-two million, twenty-one thousand, one hundred twenty-five".