1223143211 has 4 divisors (see below), whose sum is σ = 1223240424. Its totient is φ = 1223046000.

The previous prime is 1223143193. The next prime is 1223143247. The reversal of 1223143211 is 1123413221.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1223143211 - 2¹⁰ = 1223142187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1223143291) 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, 26330 + ... + 56031.

It is an arithmetic number, because the mean of its divisors is an integer number (305810106).

Almost surely, 2^1223143211 is an apocalyptic number.

1223143211 is a deficient number, since it is larger than the sum of its proper divisors (97213).

1223143211 is an equidigital number, since it uses as much as digits as its factorization.

1223143211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97212.

The product of its digits is 288, while the sum is 20.

The square root of 1223143211 is about 34973.4643837296. The cubic root of 1223143211 is about 1069.4465974009.

Adding to 1223143211 its reverse (1123413221), we get a palindrome (2346556432).

The spelling of 1223143211 in words is "one billion, two hundred twenty-three million, one hundred forty-three thousand, two hundred eleven".