11121000101221 has 2 divisors, whose sum is σ = 11121000101222. Its totient is φ = 11121000101220.

The previous prime is 11121000101203. The next prime is 11121000101287. The reversal of 11121000101221 is 12210100012111.

It is a happy number.

11121000101221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11088999900225 + 32000200996 = 3330015^2 + 178886^2 .

It is a cyclic number.

It is not a de Polignac number, because 11121000101221 - 2⁴³ = 2324907079013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11121000101291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5560500050610 + 5560500050611.

It is an arithmetic number, because the mean of its divisors is an integer number (5560500050611).

Almost surely, 2^{11121000101221} is an apocalyptic number.

It is an amenable number.

11121000101221 is a deficient number, since it is larger than the sum of its proper divisors (1).

11121000101221 is an equidigital number, since it uses as much as digits as its factorization.

11121000101221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11121000101221 its reverse (12210100012111), we get a palindrome (23331100113332).

The spelling of 11121000101221 in words is "eleven trillion, one hundred twenty-one billion, one hundred one thousand, two hundred twenty-one".