123531443201 has 4 divisors (see below), whose sum is σ = 124804963332. Its totient is φ = 122257923072.

The previous prime is 123531443171. The next prime is 123531443209. The reversal of 123531443201 is 102344135321.

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 29429745601 + 94101697600 = 171551^2 + 306760^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123531443201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123531443209) 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, 636759920 + ... + 636760113.

It is an arithmetic number, because the mean of its divisors is an integer number (31201240833).

Almost surely, 2^123531443201 is an apocalyptic number.

It is an amenable number.

123531443201 is a deficient number, since it is larger than the sum of its proper divisors (1273520131).

123531443201 is an equidigital number, since it uses as much as digits as its factorization.

123531443201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1273520130.

The product of its (nonzero) digits is 8640, while the sum is 29.

Adding to 123531443201 its reverse (102344135321), we get a palindrome (225875578522).

The spelling of 123531443201 in words is "one hundred twenty-three billion, five hundred thirty-one million, four hundred forty-three thousand, two hundred one".