1206211331 has 16 divisors (see below), whose sum is σ = 1318437120. Its totient is φ = 1096882560.

The previous prime is 1206211313. The next prime is 1206211343. The reversal of 1206211331 is 1331126021.

It is a cyclic number.

It is not a de Polignac number, because 1206211331 - 2³⁰ = 132469507 is a prime.

It is a super-2 number, since 2×1206211331² = 2909891550065583122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1206211301) 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, 254126 + ... + 258828.

It is an arithmetic number, because the mean of its divisors is an integer number (82402320).

Almost surely, 2^1206211331 is an apocalyptic number.

1206211331 is a deficient number, since it is larger than the sum of its proper divisors (112225789).

1206211331 is a wasteful number, since it uses less digits than its factorization.

1206211331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5006.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 1206211331 is about 34730.5532780576. The cubic root of 1206211331 is about 1064.4888937395.

Adding to 1206211331 its reverse (1331126021), we get a palindrome (2537337352).

The spelling of 1206211331 in words is "one billion, two hundred six million, two hundred eleven thousand, three hundred thirty-one".