1221042024143 has 4 divisors (see below), whose sum is σ = 1241059106568. Its totient is φ = 1201024941720.

The previous prime is 1221042024127. The next prime is 1221042024151. The reversal of 1221042024143 is 3414202401221.

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

It is a cyclic number.

It is not a de Polignac number, because 1221042024143 - 2⁴ = 1221042024127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221042024343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10008541121 + ... + 10008541242.

It is an arithmetic number, because the mean of its divisors is an integer number (310264776642).

Almost surely, 2^{1221042024143} is an apocalyptic number.

1221042024143 is a deficient number, since it is larger than the sum of its proper divisors (20017082425).

1221042024143 is an equidigital number, since it uses as much as digits as its factorization.

1221042024143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20017082424.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 1221042024143 its reverse (3414202401221), we get a palindrome (4635244425364).

The spelling of 1221042024143 in words is "one trillion, two hundred twenty-one billion, forty-two million, twenty-four thousand, one hundred forty-three".