11211212111203 has 16 divisors (see below), whose sum is σ = 12238958954880. Its totient is φ = 10207354300416.

The previous prime is 11211212111161. The next prime is 11211212111237. The reversal of 11211212111203 is 30211121211211.

It is not a de Polignac number, because 11211212111203 - 2¹⁷ = 11211211980131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11211212111293) 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 15 ways as a sum of consecutive naturals, for example, 4583350 + ... + 6590107.

It is an arithmetic number, because the mean of its divisors is an integer number (764934934680).

Almost surely, 2^{11211212111203} is an apocalyptic number.

11211212111203 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

11211212111203 is a deficient number, since it is larger than the sum of its proper divisors (1027746843677).

11211212111203 is a wasteful number, since it uses less digits than its factorization.

11211212111203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11174526.

The product of its (nonzero) digits is 48, while the sum is 19.

Adding to 11211212111203 its reverse (30211121211211), we get a palindrome (41422333322414).

The spelling of 11211212111203 in words is "eleven trillion, two hundred eleven billion, two hundred twelve million, one hundred eleven thousand, two hundred three".