1211311302203 has 8 divisors (see below), whose sum is σ = 1212392731440. Its totient is φ = 1210230357120.

The previous prime is 1211311302199. The next prime is 1211311302251. The reversal of 1211311302203 is 3022031131121.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1211311302203 - 2² = 1211311302199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211311302283) 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, 4980476 + ... + 5218022.

It is an arithmetic number, because the mean of its divisors is an integer number (151549091430).

Almost surely, 2^{1211311302203} is an apocalyptic number.

1211311302203 is a deficient number, since it is larger than the sum of its proper divisors (1081429237).

1211311302203 is a wasteful number, since it uses less digits than its factorization.

1211311302203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242077.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1211311302203 its reverse (3022031131121), we get a palindrome (4233342433324).

The spelling of 1211311302203 in words is "one trillion, two hundred eleven billion, three hundred eleven million, three hundred two thousand, two hundred three".