1211242423 has 8 divisors (see below), whose sum is σ = 1220280320. Its totient is φ = 1202218200.

The previous prime is 1211242421. The next prime is 1211242427. The reversal of 1211242423 is 3242421121.

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 1211242423 - 2¹ = 1211242421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1211242394 and 1211242403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211242421) 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, 234058 + ... + 239176.

It is an arithmetic number, because the mean of its divisors is an integer number (152535040).

Almost surely, 2^1211242423 is an apocalyptic number.

1211242423 is a deficient number, since it is larger than the sum of its proper divisors (9037897).

1211242423 is a wasteful number, since it uses less digits than its factorization.

1211242423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6837.

The product of its digits is 768, while the sum is 22.

The square root of 1211242423 is about 34802.9082549146. The cubic root of 1211242423 is about 1065.9668306650.

Adding to 1211242423 its reverse (3242421121), we get a palindrome (4453663544).

The spelling of 1211242423 in words is "one billion, two hundred eleven million, two hundred forty-two thousand, four hundred twenty-three".