1211313022203 has 4 divisors (see below), whose sum is σ = 1615084029608. Its totient is φ = 807542014800.

The previous prime is 1211313022201. The next prime is 1211313022223. The reversal of 1211313022203 is 3022203131121.

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

It is not a de Polignac number, because 1211313022203 - 2¹ = 1211313022201 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 1211313022203.

It is not an unprimeable number, because it can be changed into a prime (1211313022201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 201885503698 + ... + 201885503703.

It is an arithmetic number, because the mean of its divisors is an integer number (403771007402).

Almost surely, 2^{1211313022203} is an apocalyptic number.

1211313022203 is a deficient number, since it is larger than the sum of its proper divisors (403771007405).

1211313022203 is an equidigital number, since it uses as much as digits as its factorization.

1211313022203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403771007404.

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

Adding to 1211313022203 its reverse (3022203131121), we get a palindrome (4233516153324).

The spelling of 1211313022203 in words is "one trillion, two hundred eleven billion, three hundred thirteen million, twenty-two thousand, two hundred three".