1217229205 has 16 divisors (see below), whose sum is σ = 1538740800. Its totient is φ = 921818880.

The previous prime is 1217229203. The next prime is 1217229239. The reversal of 1217229205 is 5029227121.

It is not a de Polignac number, because 1217229205 - 2¹ = 1217229203 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1217229203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141261 + ... + 149629.

It is an arithmetic number, because the mean of its divisors is an integer number (96171300).

Almost surely, 2^1217229205 is an apocalyptic number.

It is an amenable number.

1217229205 is a deficient number, since it is larger than the sum of its proper divisors (321511595).

1217229205 is a wasteful number, since it uses less digits than its factorization.

1217229205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9924.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 1217229205 is about 34888.8120319394. The cubic root of 1217229205 is about 1067.7201888811.

The spelling of 1217229205 in words is "one billion, two hundred seventeen million, two hundred twenty-nine thousand, two hundred five".