1211433141 has 16 divisors (see below), whose sum is σ = 1800273600. Its totient is φ = 720108288.

The previous prime is 1211433127. The next prime is 1211433149. The reversal of 1211433141 is 1413341121.

It is not a de Polignac number, because 1211433141 - 2¹¹ = 1211431093 is a prime.

It is a super-3 number, since 3×1211433141³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211433149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 624126 + ... + 626063.

It is an arithmetic number, because the mean of its divisors is an integer number (112517100).

Almost surely, 2^1211433141 is an apocalyptic number.

It is an amenable number.

1211433141 is a deficient number, since it is larger than the sum of its proper divisors (588840459).

1211433141 is a wasteful number, since it uses less digits than its factorization.

1211433141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1250228.

The product of its digits is 288, while the sum is 21.

The square root of 1211433141 is about 34805.6481192349. The cubic root of 1211433141 is about 1066.0227755331.

Adding to 1211433141 its reverse (1413341121), we get a palindrome (2624774262).

The spelling of 1211433141 in words is "one billion, two hundred eleven million, four hundred thirty-three thousand, one hundred forty-one".