12541211377 has 4 divisors (see below), whose sum is σ = 12580773876. Its totient is φ = 12501648880.

The previous prime is 12541211351. The next prime is 12541211401. The reversal of 12541211377 is 77311214521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4945043041 + 7596168336 = 70321^2 + 87156^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12541211377 is a prime.

It is a super-2 number, since 2×12541211377² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12541211777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19780774 + ... + 19781407.

It is an arithmetic number, because the mean of its divisors is an integer number (3145193469).

Almost surely, 2^12541211377 is an apocalyptic number.

It is an amenable number.

12541211377 is a deficient number, since it is larger than the sum of its proper divisors (39562499).

12541211377 is an equidigital number, since it uses as much as digits as its factorization.

12541211377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39562498.

The product of its digits is 11760, while the sum is 34.

Adding to 12541211377 its reverse (77311214521), we get a palindrome (89852425898).

The spelling of 12541211377 in words is "twelve billion, five hundred forty-one million, two hundred eleven thousand, three hundred seventy-seven".