121335263205 has 32 divisors (see below), whose sum is σ = 209283008256. Its totient is φ = 59673421824.

The previous prime is 121335263149. The next prime is 121335263213. The reversal of 121335263205 is 502362533121.

It is not a de Polignac number, because 121335263205 - 2⁶ = 121335263141 is a prime.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 124812 + ... + 508181.

It is an arithmetic number, because the mean of its divisors is an integer number (6540094008).

Almost surely, 2^121335263205 is an apocalyptic number.

121335263205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121335263205 is a deficient number, since it is larger than the sum of its proper divisors (87947745051).

121335263205 is a wasteful number, since it uses less digits than its factorization.

121335263205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633997.

The product of its (nonzero) digits is 32400, while the sum is 33.

Adding to 121335263205 its reverse (502362533121), we get a palindrome (623697796326).

The spelling of 121335263205 in words is "one hundred twenty-one billion, three hundred thirty-five million, two hundred sixty-three thousand, two hundred five".