1252421305212 has 48 divisors (see below), whose sum is σ = 3643407436032. Its totient is φ = 325304234880.

The previous prime is 1252421305207. The next prime is 1252421305241. The reversal of 1252421305212 is 2125031242521.

It is a self number, because there is not a number n which added to its sum of digits gives 1252421305212.

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 677716233 + ... + 677718080.

It is an arithmetic number, because the mean of its divisors is an integer number (75904321584).

Almost surely, 2^{1252421305212} is an apocalyptic number.

1252421305212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1252421305212 is an abundant number, since it is smaller than the sum of its proper divisors (2390986130820).

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

1252421305212 is a wasteful number, since it uses less digits than its factorization.

1252421305212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1355434338 (or 1355434336 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 1252421305212 its reverse (2125031242521), we get a palindrome (3377452547733).

The spelling of 1252421305212 in words is "one trillion, two hundred fifty-two billion, four hundred twenty-one million, three hundred five thousand, two hundred twelve".