121521535343233 has 4 divisors (see below), whose sum is σ = 121521593565268. Its totient is φ = 121521477121200.

The previous prime is 121521535343209. The next prime is 121521535343239. The reversal of 121521535343233 is 332343535125121.

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 32152268068209 + 89369267275024 = 5670297^2 + 9453532^2 .

It is a cyclic number.

It is not a de Polignac number, because 121521535343233 - 2⁹ = 121521535342721 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121521535343233.

It is not an unprimeable number, because it can be changed into a prime (121521535343239) 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, 25859118 + ... + 30194983.

It is an arithmetic number, because the mean of its divisors is an integer number (30380398391317).

Almost surely, 2^{121521535343233} is an apocalyptic number.

It is an amenable number.

121521535343233 is a deficient number, since it is larger than the sum of its proper divisors (58222035).

121521535343233 is an equidigital number, since it uses as much as digits as its factorization.

121521535343233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58222034.

The product of its digits is 972000, while the sum is 43.

The spelling of 121521535343233 in words is "one hundred twenty-one trillion, five hundred twenty-one billion, five hundred thirty-five million, three hundred forty-three thousand, two hundred thirty-three".