1243120022 has 4 divisors (see below), whose sum is σ = 1864680036. Its totient is φ = 621560010.

The previous prime is 1243119991. The next prime is 1243120027. The reversal of 1243120022 is 2200213421.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243120027) 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 as a sum of consecutive naturals, namely, 310780004 + ... + 310780007.

It is an arithmetic number, because the mean of its divisors is an integer number (466170009).

Almost surely, 2^1243120022 is an apocalyptic number.

1243120022 is a deficient number, since it is larger than the sum of its proper divisors (621560014).

1243120022 is an equidigital number, since it uses as much as digits as its factorization.

1243120022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621560013.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1243120022 is about 35257.9072266066. The cubic root of 1243120022 is about 1075.2373795597.

Adding to 1243120022 its reverse (2200213421), we get a palindrome (3443333443).

The spelling of 1243120022 in words is "one billion, two hundred forty-three million, one hundred twenty thousand, twenty-two".