12351203691 has 16 divisors (see below), whose sum is σ = 16561932288. Its totient is φ = 8187429600.

The previous prime is 12351203663. The next prime is 12351203717. The reversal of 12351203691 is 19630215321.

It is not a de Polignac number, because 12351203691 - 2²⁶ = 12284094827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12351903691) 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, 392886 + ... + 423156.

It is an arithmetic number, because the mean of its divisors is an integer number (1035120768).

Almost surely, 2^12351203691 is an apocalyptic number.

12351203691 is a deficient number, since it is larger than the sum of its proper divisors (4210728597).

12351203691 is a wasteful number, since it uses less digits than its factorization.

12351203691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31042.

The product of its (nonzero) digits is 9720, while the sum is 33.

The spelling of 12351203691 in words is "twelve billion, three hundred fifty-one million, two hundred three thousand, six hundred ninety-one".