121442485513 has 4 divisors (see below), whose sum is σ = 121479775380. Its totient is φ = 121405195648.

The previous prime is 121442485511. The next prime is 121442485519. The reversal of 121442485513 is 315584244121.

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 115306426624 + 6136058889 = 339568^2 + 78333^2 .

It is a cyclic number.

It is not a de Polignac number, because 121442485513 - 2¹ = 121442485511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121442485511) 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, 18640048 + ... + 18646561.

It is an arithmetic number, because the mean of its divisors is an integer number (30369943845).

Almost surely, 2^121442485513 is an apocalyptic number.

It is an amenable number.

121442485513 is a deficient number, since it is larger than the sum of its proper divisors (37289867).

121442485513 is an equidigital number, since it uses as much as digits as its factorization.

121442485513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37289866.

The product of its digits is 153600, while the sum is 40.

The spelling of 121442485513 in words is "one hundred twenty-one billion, four hundred forty-two million, four hundred eighty-five thousand, five hundred thirteen".