221311121213203 has 12 divisors (see below), whose sum is σ = 257447368291152. Its totient is φ = 189692432662320.

The previous prime is 221311121213191. The next prime is 221311121213209. The reversal of 221311121213203 is 302312121113122.

It is a de Polignac number, because none of the positive numbers 2^k-221311121213203 is a prime.

It is a super-2 number, since 2×221311121213203² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221311121213209) 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 11 ways as a sum of consecutive naturals, for example, 30160983 + ... + 36773728.

It is an arithmetic number, because the mean of its divisors is an integer number (21453947357596).

Almost surely, 2^{221311121213203} is an apocalyptic number.

221311121213203 is a deficient number, since it is larger than the sum of its proper divisors (36136247077949).

221311121213203 is an equidigital number, since it uses as much as digits as its factorization.

221311121213203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67002202 (or 67002195 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 221311121213203 its reverse (302312121113122), we get a palindrome (523623242326325).

The spelling of 221311121213203 in words is "two hundred twenty-one trillion, three hundred eleven billion, one hundred twenty-one million, two hundred thirteen thousand, two hundred three".