1220121224042 has 8 divisors (see below), whose sum is σ = 2091636384096. Its totient is φ = 522909096012.

The previous prime is 1220121224017. The next prime is 1220121224099. The reversal of 1220121224042 is 2404221210221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1220121223999 and 1220121224017.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43575757988 + ... + 43575758015.

It is an arithmetic number, because the mean of its divisors is an integer number (261454548012).

Almost surely, 2^{1220121224042} is an apocalyptic number.

1220121224042 is a deficient number, since it is larger than the sum of its proper divisors (871515160054).

1220121224042 is an equidigital number, since it uses as much as digits as its factorization.

1220121224042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87151516012.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 1220121224042 its reverse (2404221210221), we get a palindrome (3624342434263).

The spelling of 1220121224042 in words is "one trillion, two hundred twenty billion, one hundred twenty-one million, two hundred twenty-four thousand, forty-two".