1321124212 has 6 divisors (see below), whose sum is σ = 2311967378. Its totient is φ = 660562104.

The previous prime is 1321124171. The next prime is 1321124219. The reversal of 1321124212 is 2124211231.

It can be written as a sum of positive squares in only one way, i.e., 1018503396 + 302620816 = 31914^2 + 17396^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1321124212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321124219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165140523 + ... + 165140530.

Almost surely, 2^1321124212 is an apocalyptic number.

It is an amenable number.

1321124212 is a deficient number, since it is larger than the sum of its proper divisors (990843166).

1321124212 is a wasteful number, since it uses less digits than its factorization.

1321124212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330281057 (or 330281055 counting only the distinct ones).

The product of its digits is 192, while the sum is 19.

The square root of 1321124212 is about 36347.2724148594. The cubic root of 1321124212 is about 1097.2726405709.

Adding to 1321124212 its reverse (2124211231), we get a palindrome (3445335443).

The spelling of 1321124212 in words is "one billion, three hundred twenty-one million, one hundred twenty-four thousand, two hundred twelve".