1221023231003 has 4 divisors (see below), whose sum is σ = 1221029390448. Its totient is φ = 1221017071560.

The previous prime is 1221023230879. The next prime is 1221023231023. The reversal of 1221023231003 is 3001323201221.

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 1221023231003 - 2⁸ = 1221023230747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1221023231023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2772128 + ... + 3182253.

It is an arithmetic number, because the mean of its divisors is an integer number (305257347612).

Almost surely, 2^{1221023231003} is an apocalyptic number.

1221023231003 is a deficient number, since it is larger than the sum of its proper divisors (6159445).

1221023231003 is an equidigital number, since it uses as much as digits as its factorization.

1221023231003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6159444.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 1221023231003 its reverse (3001323201221), we get a palindrome (4222346432224).

The spelling of 1221023231003 in words is "one trillion, two hundred twenty-one billion, twenty-three million, two hundred thirty-one thousand, three".