121222205 has 16 divisors (see below), whose sum is σ = 158868864. Its totient is φ = 88253760.

The previous prime is 121222193. The next prime is 121222237. The reversal of 121222205 is 502222121.

It is not a de Polignac number, because 121222205 - 2⁶ = 121222141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8519 + ... + 17748.

It is an arithmetic number, because the mean of its divisors is an integer number (9929304).

Almost surely, 2^121222205 is an apocalyptic number.

It is an amenable number.

121222205 is a deficient number, since it is larger than the sum of its proper divisors (37646659).

121222205 is a wasteful number, since it uses less digits than its factorization.

121222205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26356.

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

The square root of 121222205 is about 11010.0955944987. The cubic root of 121222205 is about 494.9113264961.

Adding to 121222205 its reverse (502222121), we get a palindrome (623444326).

The spelling of 121222205 in words is "one hundred twenty-one million, two hundred twenty-two thousand, two hundred five".