12211019257 has 4 divisors (see below), whose sum is σ = 12604923136. Its totient is φ = 11817115380.

The previous prime is 12211019231. The next prime is 12211019269. The reversal of 12211019257 is 75291011221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12211019257 - 2⁷ = 12211019129 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 393903847 = 12211019257 / (1 + 2 + 2 + 1 + 1 + 0 + 1 + 9 + 2 + 5 + 7).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12211019857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196951893 + ... + 196951954.

It is an arithmetic number, because the mean of its divisors is an integer number (3151230784).

Almost surely, 2^12211019257 is an apocalyptic number.

It is an amenable number.

12211019257 is a deficient number, since it is larger than the sum of its proper divisors (393903879).

12211019257 is an equidigital number, since it uses as much as digits as its factorization.

12211019257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393903878.

The product of its (nonzero) digits is 2520, while the sum is 31.

The spelling of 12211019257 in words is "twelve billion, two hundred eleven million, nineteen thousand, two hundred fifty-seven".