21110121001153 has 2 divisors, whose sum is σ = 21110121001154. Its totient is φ = 21110121001152.

The previous prime is 21110121001141. The next prime is 21110121001241. The reversal of 21110121001153 is 35110012101112.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21099994201729 + 10126799424 = 4593473^2 + 100632^2 .

It is a cyclic number.

It is not a de Polignac number, because 21110121001153 - 2⁹ = 21110121000641 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21110121001153.

It is not a weakly prime, because it can be changed into another prime (21110121007153) 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 as a sum of consecutive naturals, namely, 10555060500576 + 10555060500577.

It is an arithmetic number, because the mean of its divisors is an integer number (10555060500577).

Almost surely, 2^{21110121001153} is an apocalyptic number.

It is an amenable number.

21110121001153 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110121001153 is an equidigital number, since it uses as much as digits as its factorization.

21110121001153 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60, while the sum is 19.

Adding to 21110121001153 its reverse (35110012101112), we get a palindrome (56220133102265).

The spelling of 21110121001153 in words is "twenty-one trillion, one hundred ten billion, one hundred twenty-one million, one thousand, one hundred fifty-three".