1206063221 has 16 divisors (see below), whose sum is σ = 1327218048. Its totient is φ = 1086873600.

The previous prime is 1206063179. The next prime is 1206063307. The reversal of 1206063221 is 1223606021.

It is a cyclic number.

It is not a de Polignac number, because 1206063221 - 2¹⁰ = 1206062197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1206063821) 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, 657776 + ... + 659606.

It is an arithmetic number, because the mean of its divisors is an integer number (82951128).

Almost surely, 2^1206063221 is an apocalyptic number.

1206063221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1206063221 is a deficient number, since it is larger than the sum of its proper divisors (121154827).

1206063221 is a wasteful number, since it uses less digits than its factorization.

1206063221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2332.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 1206063221 is about 34728.4209402040. The cubic root of 1206063221 is about 1064.4453226284.

Adding to 1206063221 its reverse (1223606021), we get a palindrome (2429669242).

The spelling of 1206063221 in words is "one billion, two hundred six million, sixty-three thousand, two hundred twenty-one".