1212221021003 has 8 divisors (see below), whose sum is σ = 1236185045088. Its totient is φ = 1188455868864.

The previous prime is 1212221020889. The next prime is 1212221021017. The reversal of 1212221021003 is 3001201222121.

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

It is a cyclic number.

It is not a de Polignac number, because 1212221021003 - 2¹⁴ = 1212221004619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212221021023) 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, 49705676 + ... + 49730057.

It is an arithmetic number, because the mean of its divisors is an integer number (154523130636).

Almost surely, 2^{1212221021003} is an apocalyptic number.

1212221021003 is a deficient number, since it is larger than the sum of its proper divisors (23964024085).

1212221021003 is an equidigital number, since it uses as much as digits as its factorization.

1212221021003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99435973.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 1212221021003 its reverse (3001201222121), we get a palindrome (4213422243124).

The spelling of 1212221021003 in words is "one trillion, two hundred twelve billion, two hundred twenty-one million, twenty-one thousand, three".