1221230211303 has 4 divisors (see below), whose sum is σ = 1628306948408. Its totient is φ = 814153474200.

The previous prime is 1221230211269. The next prime is 1221230211317. The reversal of 1221230211303 is 3031120321221.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1221230211303 - 2¹² = 1221230207207 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1221230211303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1221230216303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203538368548 + ... + 203538368553.

It is an arithmetic number, because the mean of its divisors is an integer number (407076737102).

Almost surely, 2^{1221230211303} is an apocalyptic number.

1221230211303 is a deficient number, since it is larger than the sum of its proper divisors (407076737105).

1221230211303 is an equidigital number, since it uses as much as digits as its factorization.

1221230211303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407076737104.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1221230211303 its reverse (3031120321221), we get a palindrome (4252350532524).

The spelling of 1221230211303 in words is "one trillion, two hundred twenty-one billion, two hundred thirty million, two hundred eleven thousand, three hundred three".