1221312200303 has 16 divisors (see below), whose sum is σ = 1329571478592. Its totient is φ = 1115119200000.

The previous prime is 1221312200299. The next prime is 1221312200321. The reversal of 1221312200303 is 3030022131221.

It is not a de Polignac number, because 1221312200303 - 2² = 1221312200299 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221312200323) 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, 902603 + ... + 1804803.

It is an arithmetic number, because the mean of its divisors is an integer number (83098217412).

Almost surely, 2^{1221312200303} is an apocalyptic number.

1221312200303 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1221312200303 is a deficient number, since it is larger than the sum of its proper divisors (108259278289).

1221312200303 is a wasteful number, since it uses less digits than its factorization.

1221312200303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 903346.

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

Adding to 1221312200303 its reverse (3030022131221), we get a palindrome (4251334331524).

The spelling of 1221312200303 in words is "one trillion, two hundred twenty-one billion, three hundred twelve million, two hundred thousand, three hundred three".