123021444401 has 4 divisors (see below), whose sum is σ = 130257999972. Its totient is φ = 115784888832.

The previous prime is 123021444379. The next prime is 123021444407. The reversal of 123021444401 is 104444120321.

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 101123364001 + 21898080400 = 317999^2 + 147980^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123021444401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123021444407) 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, 3618277760 + ... + 3618277793.

It is an arithmetic number, because the mean of its divisors is an integer number (32564499993).

Almost surely, 2^123021444401 is an apocalyptic number.

It is an amenable number.

123021444401 is a deficient number, since it is larger than the sum of its proper divisors (7236555571).

123021444401 is an equidigital number, since it uses as much as digits as its factorization.

123021444401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7236555570.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 123021444401 its reverse (104444120321), we get a palindrome (227465564722).

The spelling of 123021444401 in words is "one hundred twenty-three billion, twenty-one million, four hundred forty-four thousand, four hundred one".