11221111211201 has 4 divisors (see below), whose sum is σ = 11708985611712. Its totient is φ = 10733236810692.

The previous prime is 11221111211129. The next prime is 11221111211249. The reversal of 11221111211201 is 10211211112211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11221111211201 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11221111211201.

It is not an unprimeable number, because it can be changed into a prime (11221111211291) 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, 243937200221 + ... + 243937200266.

It is an arithmetic number, because the mean of its divisors is an integer number (2927246402928).

Almost surely, 2^{11221111211201} is an apocalyptic number.

It is an amenable number.

11221111211201 is a deficient number, since it is larger than the sum of its proper divisors (487874400511).

11221111211201 is an equidigital number, since it uses as much as digits as its factorization.

11221111211201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487874400510.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 11221111211201 its reverse (10211211112211), we get a palindrome (21432322323412).

The spelling of 11221111211201 in words is "eleven trillion, two hundred twenty-one billion, one hundred eleven million, two hundred eleven thousand, two hundred one".