1212221220203 has 8 divisors (see below), whose sum is σ = 1385415651840. Its totient is φ = 1039031781480.

The previous prime is 1212221220193. The next prime is 1212221220241. The reversal of 1212221220203 is 3020221222121.

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

It is a de Polignac number, because none of the positive numbers 2^k-1212221220203 is a prime.

It is a super-2 number, since 2×1212221220203² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212221220253) 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, 712643 + ... + 1712396.

It is an arithmetic number, because the mean of its divisors is an integer number (173176956480).

Almost surely, 2^{1212221220203} is an apocalyptic number.

1212221220203 is a deficient number, since it is larger than the sum of its proper divisors (173194431637).

1212221220203 is an equidigital number, since it uses as much as digits as its factorization.

1212221220203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2496457.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 1212221220203 its reverse (3020221222121), we get a palindrome (4232442442324).

The spelling of 1212221220203 in words is "one trillion, two hundred twelve billion, two hundred twenty-one million, two hundred twenty thousand, two hundred three".