1221220903443 has 8 divisors (see below), whose sum is σ = 1628304469248. Its totient is φ = 814142303304.

The previous prime is 1221220903433. The next prime is 1221220903477. The reversal of 1221220903443 is 3443090221221.

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

It is not a de Polignac number, because 1221220903443 - 2⁵ = 1221220903411 is a prime.

It is a super-2 number, since 2×1221220903443² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1221220903433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 623655 + ... + 1682672.

It is an arithmetic number, because the mean of its divisors is an integer number (203538058656).

Almost surely, 2^{1221220903443} is an apocalyptic number.

1221220903443 is a deficient number, since it is larger than the sum of its proper divisors (407083565805).

1221220903443 is a wasteful number, since it uses less digits than its factorization.

1221220903443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2482833.

The product of its (nonzero) digits is 20736, while the sum is 33.

The spelling of 1221220903443 in words is "one trillion, two hundred twenty-one billion, two hundred twenty million, nine hundred three thousand, four hundred forty-three".