121535112241 has 4 divisors (see below), whose sum is σ = 121535848512. Its totient is φ = 121534375972.

The previous prime is 121535112239. The next prime is 121535112247. The reversal of 121535112241 is 142211535121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 142211535121 = 47 ⋅3025777343.

It is a cyclic number.

It is not a de Polignac number, because 121535112241 - 2¹ = 121535112239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121535112247) 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, 6660 + ... + 493066.

It is an arithmetic number, because the mean of its divisors is an integer number (30383962128).

Almost surely, 2^121535112241 is an apocalyptic number.

It is an amenable number.

121535112241 is a deficient number, since it is larger than the sum of its proper divisors (736271).

121535112241 is an equidigital number, since it uses as much as digits as its factorization.

121535112241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736270.

The product of its digits is 2400, while the sum is 28.

Adding to 121535112241 its reverse (142211535121), we get a palindrome (263746647362).

The spelling of 121535112241 in words is "one hundred twenty-one billion, five hundred thirty-five million, one hundred twelve thousand, two hundred forty-one".