121442645633 has 4 divisors (see below), whose sum is σ = 121443352068. Its totient is φ = 121441939200.

The previous prime is 121442645617. The next prime is 121442645647. The reversal of 121442645633 is 336546244121.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 64804357489 + 56638288144 = 254567^2 + 237988^2 .

It is a cyclic number.

It is not a de Polignac number, because 121442645633 - 2⁴ = 121442645617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121442645603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90185 + ... + 501017.

It is an arithmetic number, because the mean of its divisors is an integer number (30360838017).

Almost surely, 2^121442645633 is an apocalyptic number.

It is an amenable number.

121442645633 is a deficient number, since it is larger than the sum of its proper divisors (706435).

121442645633 is an equidigital number, since it uses as much as digits as its factorization.

121442645633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706434.

The product of its digits is 414720, while the sum is 41.

Adding to 121442645633 its reverse (336546244121), we get a palindrome (457988889754).

The spelling of 121442645633 in words is "one hundred twenty-one billion, four hundred forty-two million, six hundred forty-five thousand, six hundred thirty-three".