1211213040303 has 32 divisors (see below), whose sum is σ = 1909617062400. Its totient is φ = 668144969856.

The previous prime is 1211213040299. The next prime is 1211213040319. The reversal of 1211213040303 is 3030403121121.

It is not a de Polignac number, because 1211213040303 - 2² = 1211213040299 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 1211213040303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211213040343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3591913 + ... + 3914621.

It is an arithmetic number, because the mean of its divisors is an integer number (59675533200).

Almost surely, 2^{1211213040303} is an apocalyptic number.

1211213040303 is a deficient number, since it is larger than the sum of its proper divisors (698404022097).

1211213040303 is a wasteful number, since it uses less digits than its factorization.

1211213040303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328911.

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

Adding to 1211213040303 its reverse (3030403121121), we get a palindrome (4241616161424).

The spelling of 1211213040303 in words is "one trillion, two hundred eleven billion, two hundred thirteen million, forty thousand, three hundred three".