11101221020201 has 32 divisors (see below), whose sum is σ = 12523742864640. Its totient is φ = 9763424504064.

The previous prime is 11101221020171. The next prime is 11101221020231. The reversal of 11101221020201 is 10202012210111.

It is an interprime number because it is at equal distance from previous prime (11101221020171) and next prime (11101221020231).

It is a de Polignac number, because none of the positive numbers 2^k-11101221020201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11101221020231) 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 31 ways as a sum of consecutive naturals, for example, 566465735 + ... + 566485331.

It is an arithmetic number, because the mean of its divisors is an integer number (391366964520).

Almost surely, 2^{11101221020201} is an apocalyptic number.

It is an amenable number.

11101221020201 is a deficient number, since it is larger than the sum of its proper divisors (1422521844439).

11101221020201 is a wasteful number, since it uses less digits than its factorization.

11101221020201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26945.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11101221020201 its reverse (10202012210111), we get a palindrome (21303233230312).

The spelling of 11101221020201 in words is "eleven trillion, one hundred one billion, two hundred twenty-one million, twenty thousand, two hundred one".