11211221120203 has 4 divisors (see below), whose sum is σ = 12073622744848. Its totient is φ = 10348819495560.

The previous prime is 11211221120147. The next prime is 11211221120221. The reversal of 11211221120203 is 30202112211211.

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

It is not a de Polignac number, because 11211221120203 - 2⁹ = 11211221119691 is a prime.

It is a super-2 number, since 2×11211221120203² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11211221120503) 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, 431200812303 + ... + 431200812328.

It is an arithmetic number, because the mean of its divisors is an integer number (3018405686212).

Almost surely, 2^{11211221120203} is an apocalyptic number.

11211221120203 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

11211221120203 is a deficient number, since it is larger than the sum of its proper divisors (862401624645).

11211221120203 is an equidigital number, since it uses as much as digits as its factorization.

11211221120203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862401624644.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 11211221120203 its reverse (30202112211211), we get a palindrome (41413333331414).

The spelling of 11211221120203 in words is "eleven trillion, two hundred eleven billion, two hundred twenty-one million, one hundred twenty thousand, two hundred three".