1221042024142 has 16 divisors (see below), whose sum is σ = 1845701154000. Its totient is φ = 605809097920.

The previous prime is 1221042024127. The next prime is 1221042024151. The reversal of 1221042024142 is 2414202401221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2991234 + ... + 3374842.

It is an arithmetic number, because the mean of its divisors is an integer number (115356322125).

Almost surely, 2^{1221042024142} is an apocalyptic number.

1221042024142 is a deficient number, since it is larger than the sum of its proper divisors (624659129858).

1221042024142 is a wasteful number, since it uses less digits than its factorization.

1221042024142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395891.

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 1221042024142 its reverse (2414202401221), we get a palindrome (3635244425363).

The spelling of 1221042024142 in words is "one trillion, two hundred twenty-one billion, forty-two million, twenty-four thousand, one hundred forty-two".