1211142343 has 8 divisors (see below), whose sum is σ = 1256288528. Its totient is φ = 1166768064.

The previous prime is 1211142313. The next prime is 1211142397. The reversal of 1211142343 is 3432411121.

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 1211142343 - 2⁵ = 1211142311 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 (1211142313) 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 7 ways as a sum of consecutive naturals, for example, 189780 + ... + 196057.

It is an arithmetic number, because the mean of its divisors is an integer number (157036066).

Almost surely, 2^1211142343 is an apocalyptic number.

1211142343 is a deficient number, since it is larger than the sum of its proper divisors (45146185).

1211142343 is an equidigital number, since it uses as much as digits as its factorization.

1211142343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385953.

The product of its digits is 576, while the sum is 22.

The square root of 1211142343 is about 34801.4704143374. The cubic root of 1211142343 is about 1065.9374710321.

Adding to 1211142343 its reverse (3432411121), we get a palindrome (4643553464).

The spelling of 1211142343 in words is "one billion, two hundred eleven million, one hundred forty-two thousand, three hundred forty-three".