1221200043043 has 8 divisors (see below), whose sum is σ = 1249672793600. Its totient is φ = 1192730599368.

The previous prime is 1221200043031. The next prime is 1221200043061. The reversal of 1221200043043 is 3403400021221.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1221200043043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221200043013) 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 7 ways as a sum of consecutive naturals, for example, 71583 + ... + 1564456.

It is an arithmetic number, because the mean of its divisors is an integer number (156209099200).

Almost surely, 2^{1221200043043} is an apocalyptic number.

1221200043043 is a deficient number, since it is larger than the sum of its proper divisors (28472750557).

1221200043043 is a wasteful number, since it uses less digits than its factorization.

1221200043043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1653441.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 1221200043043 its reverse (3403400021221), we get a palindrome (4624600064264).

The spelling of 1221200043043 in words is "one trillion, two hundred twenty-one billion, two hundred million, forty-three thousand, forty-three".