12121535243 has 2 divisors, whose sum is σ = 12121535244. Its totient is φ = 12121535242.

The previous prime is 12121535213. The next prime is 12121535249. The reversal of 12121535243 is 34253512121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12121535243 - 2¹⁶ = 12121469707 is a prime.

It is not a weakly prime, because it can be changed into another prime (12121535249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6060767621 + 6060767622.

It is an arithmetic number, because the mean of its divisors is an integer number (6060767622).

Almost surely, 2^12121535243 is an apocalyptic number.

12121535243 is a deficient number, since it is larger than the sum of its proper divisors (1).

12121535243 is an equidigital number, since it uses as much as digits as its factorization.

12121535243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7200, while the sum is 29.

The spelling of 12121535243 in words is "twelve billion, one hundred twenty-one million, five hundred thirty-five thousand, two hundred forty-three".