1220021312003 has 16 divisors (see below), whose sum is σ = 1327627555296. Its totient is φ = 1114384296960.

The previous prime is 1220021311963. The next prime is 1220021312017. The reversal of 1220021312003 is 3002131200221.

It is a cyclic number.

It is not a de Polignac number, because 1220021312003 - 2¹⁰ = 1220021310979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220021312303) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8110625 + ... + 8259677.

It is an arithmetic number, because the mean of its divisors is an integer number (82976722206).

Almost surely, 2^{1220021312003} is an apocalyptic number.

1220021312003 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1220021312003 is a deficient number, since it is larger than the sum of its proper divisors (107606243293).

1220021312003 is a wasteful number, since it uses less digits than its factorization.

1220021312003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155654.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 1220021312003 its reverse (3002131200221), we get a palindrome (4222152512224).

The spelling of 1220021312003 in words is "one trillion, two hundred twenty billion, twenty-one million, three hundred twelve thousand, three".