11100221221121 has 2 divisors, whose sum is σ = 11100221221122. Its totient is φ = 11100221221120.

The previous prime is 11100221220997. The next prime is 11100221221147. The reversal of 11100221221121 is 12112212200111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7789681000000 + 3310540221121 = 2791000^2 + 1819489^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11100221221121 is a prime.

It is a super-2 number, since 2×11100221221121² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11100221221121.

It is not a weakly prime, because it can be changed into another prime (11100221221181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5550110610560 + 5550110610561.

It is an arithmetic number, because the mean of its divisors is an integer number (5550110610561).

Almost surely, 2^{11100221221121} is an apocalyptic number.

It is an amenable number.

11100221221121 is a deficient number, since it is larger than the sum of its proper divisors (1).

11100221221121 is an equidigital number, since it uses as much as digits as its factorization.

11100221221121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 11100221221121 its reverse (12112212200111), we get a palindrome (23212433421232).

The spelling of 11100221221121 in words is "eleven trillion, one hundred billion, two hundred twenty-one million, two hundred twenty-one thousand, one hundred twenty-one".