1221310201303 has 16 divisors (see below), whose sum is σ = 1286875934080. Its totient is φ = 1157603874336.

The previous prime is 1221310201271. The next prime is 1221310201357. The reversal of 1221310201303 is 3031020131221.

It is a cyclic number.

It is not a de Polignac number, because 1221310201303 - 2⁵ = 1221310201271 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 (1221310201403) 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, 409725 + ... + 1615702.

It is an arithmetic number, because the mean of its divisors is an integer number (80429745880).

Almost surely, 2^{1221310201303} is an apocalyptic number.

1221310201303 is a deficient number, since it is larger than the sum of its proper divisors (65565732777).

1221310201303 is a wasteful number, since it uses less digits than its factorization.

1221310201303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2025886.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 1221310201303 its reverse (3031020131221), we get a palindrome (4252330332524).

The spelling of 1221310201303 in words is "one trillion, two hundred twenty-one billion, three hundred ten million, two hundred one thousand, three hundred three".