123041405451 has 4 divisors (see below), whose sum is σ = 164055207272. Its totient is φ = 82027603632.

The previous prime is 123041405447. The next prime is 123041405497. The reversal of 123041405451 is 154504140321.

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

It is not a de Polignac number, because 123041405451 - 2² = 123041405447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123041405401) 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, 20506900906 + ... + 20506900911.

It is an arithmetic number, because the mean of its divisors is an integer number (41013801818).

Almost surely, 2^123041405451 is an apocalyptic number.

123041405451 is a deficient number, since it is larger than the sum of its proper divisors (41013801821).

123041405451 is an equidigital number, since it uses as much as digits as its factorization.

123041405451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41013801820.

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 123041405451 its reverse (154504140321), we get a palindrome (277545545772).

The spelling of 123041405451 in words is "one hundred twenty-three billion, forty-one million, four hundred five thousand, four hundred fifty-one".