1232121043 has 4 divisors (see below), whose sum is σ = 1232572000. Its totient is φ = 1231670088.

The previous prime is 1232120977. The next prime is 1232121047. The reversal of 1232121043 is 3401212321.

It is a happy number.

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 1232121043 - 2¹⁷ = 1231989971 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1232121043.

It is not an unprimeable number, because it can be changed into a prime (1232121047) 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, 221355 + ... + 226852.

It is an arithmetic number, because the mean of its divisors is an integer number (308143000).

Almost surely, 2^1232121043 is an apocalyptic number.

1232121043 is a deficient number, since it is larger than the sum of its proper divisors (450957).

1232121043 is an equidigital number, since it uses as much as digits as its factorization.

1232121043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450956.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1232121043 is about 35101.5817734757. The cubic root of 1232121043 is about 1072.0567894634.

Adding to 1232121043 its reverse (3401212321), we get a palindrome (4633333364).

The spelling of 1232121043 in words is "one billion, two hundred thirty-two million, one hundred twenty-one thousand, forty-three".