1211422343 has 4 divisors (see below), whose sum is σ = 1225033920. Its totient is φ = 1197810768.

The previous prime is 1211422339. The next prime is 1211422379. The reversal of 1211422343 is 3432241121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1211422343 - 2² = 1211422339 is a prime.

It is a super-3 number, since 3×1211422343³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211422543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6805655 + ... + 6805832.

It is an arithmetic number, because the mean of its divisors is an integer number (306258480).

Almost surely, 2^1211422343 is an apocalyptic number.

1211422343 is a deficient number, since it is larger than the sum of its proper divisors (13611577).

1211422343 is an equidigital number, since it uses as much as digits as its factorization.

1211422343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13611576.

The product of its digits is 1152, while the sum is 23.

The square root of 1211422343 is about 34805.4930003872. The cubic root of 1211422343 is about 1066.0196082244.

Adding to 1211422343 its reverse (3432241121), we get a palindrome (4643663464).

The spelling of 1211422343 in words is "one billion, two hundred eleven million, four hundred twenty-two thousand, three hundred forty-three".