1221411120342 has 48 divisors (see below), whose sum is σ = 2841825429360. Its totient is φ = 348953106432.

The previous prime is 1221411120329. The next prime is 1221411120343. The reversal of 1221411120342 is 2430211141221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221411120343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5001334 + ... + 5239862.

It is an arithmetic number, because the mean of its divisors is an integer number (59204696445).

Almost surely, 2^{1221411120342} is an apocalyptic number.

1221411120342 is an abundant number, since it is smaller than the sum of its proper divisors (1620414309018).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1221411120342 is a wasteful number, since it uses less digits than its factorization.

1221411120342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255965 (or 255958 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

Adding to 1221411120342 its reverse (2430211141221), we get a palindrome (3651622261563).

The spelling of 1221411120342 in words is "one trillion, two hundred twenty-one billion, four hundred eleven million, one hundred twenty thousand, three hundred forty-two".