121445440605 has 48 divisors (see below), whose sum is σ = 223778730240. Its totient is φ = 60754320000.

The previous prime is 121445440603. The next prime is 121445440609. The reversal of 121445440605 is 506044544121.

121445440605 is a `hidden beast` number, since 1 + 2 + 1 + 4 + 4 + 5 + 4 + 40 + 605 = 666.

It is not a de Polignac number, because 121445440605 - 2¹ = 121445440603 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121445440605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121445440601) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 616821 + ... + 789530.

It is an arithmetic number, because the mean of its divisors is an integer number (4662056880).

Almost surely, 2^121445440605 is an apocalyptic number.

121445440605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121445440605 is a deficient number, since it is larger than the sum of its proper divisors (102333289635).

121445440605 is a wasteful number, since it uses less digits than its factorization.

121445440605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1406482 (or 1406479 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

Adding to 121445440605 its reverse (506044544121), we get a palindrome (627489984726).

The spelling of 121445440605 in words is "one hundred twenty-one billion, four hundred forty-five million, four hundred forty thousand, six hundred five".