1220173124042 has 4 divisors (see below), whose sum is σ = 1830259686066. Its totient is φ = 610086562020.

The previous prime is 1220173124041. The next prime is 1220173124069. The reversal of 1220173124042 is 2404213710221.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 741753285001 + 478419839041 = 861251^2 + 691679^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1220173123996 and 1220173124014.

It is not an unprimeable number, because it can be changed into a prime (1220173124041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305043281009 + ... + 305043281012.

Almost surely, 2^{1220173124042} is an apocalyptic number.

1220173124042 is a deficient number, since it is larger than the sum of its proper divisors (610086562024).

1220173124042 is an equidigital number, since it uses as much as digits as its factorization.

1220173124042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610086562023.

The product of its (nonzero) digits is 5376, while the sum is 29.

Adding to 1220173124042 its reverse (2404213710221), we get a palindrome (3624386834263).

The spelling of 1220173124042 in words is "one trillion, two hundred twenty billion, one hundred seventy-three million, one hundred twenty-four thousand, forty-two".