12443402501 has 4 divisors (see below), whose sum is σ = 13175367372. Its totient is φ = 11711437632.

The previous prime is 12443402471. The next prime is 12443402533. The reversal of 12443402501 is 10520434421.

It is a Cunningham number, because it is equal to 111550²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10520434421 = 7 ⋅1502919203.

It can be written as a sum of positive squares in 2 ways, for example, as 9687677476 + 2755725025 = 98426^2 + 52495^2 .

It is not a de Polignac number, because 12443402501 - 2⁶ = 12443402437 is a prime.

It is a super-4 number, since 4×12443402501⁴ (a number of 41 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12443402801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 365982410 + ... + 365982443.

It is an arithmetic number, because the mean of its divisors is an integer number (3293841843).

Almost surely, 2^12443402501 is an apocalyptic number.

It is an amenable number.

12443402501 is a deficient number, since it is larger than the sum of its proper divisors (731964871).

12443402501 is an equidigital number, since it uses as much as digits as its factorization.

12443402501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731964870.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 12443402501 its reverse (10520434421), we get a palindrome (22963836922).

The spelling of 12443402501 in words is "twelve billion, four hundred forty-three million, four hundred two thousand, five hundred one".