1211201205 has 32 divisors (see below), whose sum is σ = 1962455040. Its totient is φ = 637834560.

The previous prime is 1211201107. The next prime is 1211201207. The reversal of 1211201205 is 5021021121.

1211201205 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1211201205 - 2¹⁵ = 1211168437 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211201207) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 646420 + ... + 648290.

It is an arithmetic number, because the mean of its divisors is an integer number (61326720).

Almost surely, 2^1211201205 is an apocalyptic number.

1211201205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1211201205 is a deficient number, since it is larger than the sum of its proper divisors (751253835).

1211201205 is a wasteful number, since it uses less digits than its factorization.

1211201205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2401.

The product of its (nonzero) digits is 40, while the sum is 15.

The square root of 1211201205 is about 34802.3160867204. The cubic root of 1211201205 is about 1065.9547390808.

Adding to 1211201205 its reverse (5021021121), we get a palindrome (6232222326).

The spelling of 1211201205 in words is "one billion, two hundred eleven million, two hundred one thousand, two hundred five".