121051205 has 32 divisors (see below), whose sum is σ = 163202688. Its totient is φ = 85446400.

The previous prime is 121051201. The next prime is 121051211. The reversal of 121051205 is 502150121.

It is not a de Polignac number, because 121051205 - 2² = 121051201 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121051201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 381707 + ... + 382023.

It is an arithmetic number, because the mean of its divisors is an integer number (5100084).

Almost surely, 2^121051205 is an apocalyptic number.

It is an amenable number.

121051205 is a deficient number, since it is larger than the sum of its proper divisors (42151483).

121051205 is a wasteful number, since it uses less digits than its factorization.

121051205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517.

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 121051205 is about 11002.3272538132. The cubic root of 121051205 is about 494.6785042946.

The spelling of 121051205 in words is "one hundred twenty-one million, fifty-one thousand, two hundred five".