1211133143 has 8 divisors (see below), whose sum is σ = 1321488000. Its totient is φ = 1100820280.

The previous prime is 1211133137. The next prime is 1211133163. The reversal of 1211133143 is 3413311121.

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 1211133143 - 2⁴ = 1211133127 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 (1211133163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110108 + ... + 120606.

It is an arithmetic number, because the mean of its divisors is an integer number (165186000).

Almost surely, 2^1211133143 is an apocalyptic number.

1211133143 is a deficient number, since it is larger than the sum of its proper divisors (110354857).

1211133143 is a wasteful number, since it uses less digits than its factorization.

1211133143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20997.

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

The square root of 1211133143 is about 34801.3382357633. The cubic root of 1211133143 is about 1065.9347720238.

Adding to 1211133143 its reverse (3413311121), we get a palindrome (4624444264).

It can be divided in two parts, 12111 and 33143, that added together give a palindrome (45254).

The spelling of 1211133143 in words is "one billion, two hundred eleven million, one hundred thirty-three thousand, one hundred forty-three".