1211031133 has 8 divisors (see below), whose sum is σ = 1304498048. Its totient is φ = 1117608624.

The previous prime is 1211031131. The next prime is 1211031137. The reversal of 1211031133 is 3311301121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1211031133 - 2¹ = 1211031131 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211031131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64816 + ... + 81382.

It is an arithmetic number, because the mean of its divisors is an integer number (163062256).

Almost surely, 2^1211031133 is an apocalyptic number.

1211031133 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1211031133 is a deficient number, since it is larger than the sum of its proper divisors (93466915).

1211031133 is a wasteful number, since it uses less digits than its factorization.

1211031133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22203.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 1211031133 is about 34799.8726003415. The cubic root of 1211031133 is about 1065.9048443869.

Adding to 1211031133 its reverse (3311301121), we get a palindrome (4522332254).

The spelling of 1211031133 in words is "one billion, two hundred eleven million, thirty-one thousand, one hundred thirty-three".