123021440272 has 20 divisors (see below), whose sum is σ = 238377375436. Its totient is φ = 61504698240.

The previous prime is 123021440251. The next prime is 123021440323. The reversal of 123021440272 is 272044120321.

123021440272 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 88568140816 + 34453299456 = 297604^2 + 185616^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 123021440272.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205479 + ... + 536902.

Almost surely, 2^123021440272 is an apocalyptic number.

It is an amenable number.

123021440272 is a deficient number, since it is larger than the sum of its proper divisors (115355935164).

123021440272 is a wasteful number, since it uses less digits than its factorization.

123021440272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 752746 (or 752740 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 28.

Adding to 123021440272 its reverse (272044120321), we get a palindrome (395065560593).

The spelling of 123021440272 in words is "one hundred twenty-three billion, twenty-one million, four hundred forty thousand, two hundred seventy-two".