1212321221003 has 8 divisors (see below), whose sum is σ = 1219711530240. Its totient is φ = 1204932470440.

The previous prime is 1212321220987. The next prime is 1212321221009. The reversal of 1212321221003 is 3001221232121.

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 1212321221003 - 2⁴ = 1212321220987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212321221009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1190108 + ... + 1959846.

It is an arithmetic number, because the mean of its divisors is an integer number (152463941280).

Almost surely, 2^{1212321221003} is an apocalyptic number.

1212321221003 is a deficient number, since it is larger than the sum of its proper divisors (7390309237).

1212321221003 is an equidigital number, since it uses as much as digits as its factorization.

1212321221003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779337.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 1212321221003 its reverse (3001221232121), we get a palindrome (4213542453124).

The spelling of 1212321221003 in words is "one trillion, two hundred twelve billion, three hundred twenty-one million, two hundred twenty-one thousand, three".