121220002205 has 8 divisors (see below), whose sum is σ = 154020708792. Its totient is φ = 91271531008.

The previous prime is 121220002157. The next prime is 121220002207. The reversal of 121220002205 is 502200022121.

It can be written as a sum of positive squares in 4 ways, for example, as 39701758009 + 81518244196 = 199253^2 + 285514^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121220002205 - 2¹⁰ = 121220001181 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121220002207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 713058752 + ... + 713058921.

It is an arithmetic number, because the mean of its divisors is an integer number (19252588599).

Almost surely, 2^121220002205 is an apocalyptic number.

It is an amenable number.

121220002205 is a deficient number, since it is larger than the sum of its proper divisors (32800706587).

121220002205 is a wasteful number, since it uses less digits than its factorization.

121220002205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1426117695.

The product of its (nonzero) digits is 160, while the sum is 17.

Adding to 121220002205 its reverse (502200022121), we get a palindrome (623420024326).

The spelling of 121220002205 in words is "one hundred twenty-one billion, two hundred twenty million, two thousand, two hundred five".