12250821615 has 16 divisors (see below), whose sum is σ = 20632963200. Its totient is φ = 6189888672.

The previous prime is 12250821553. The next prime is 12250821617. The reversal of 12250821615 is 51612805221.

It is not a de Polignac number, because 12250821615 - 2¹⁶ = 12250756079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12250821617) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21492385 + ... + 21492954.

It is an arithmetic number, because the mean of its divisors is an integer number (1289560200).

Almost surely, 2^12250821615 is an apocalyptic number.

12250821615 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12250821615 is a deficient number, since it is larger than the sum of its proper divisors (8382141585).

12250821615 is a wasteful number, since it uses less digits than its factorization.

12250821615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42985366.

The product of its (nonzero) digits is 9600, while the sum is 33.

The spelling of 12250821615 in words is "twelve billion, two hundred fifty million, eight hundred twenty-one thousand, six hundred fifteen".