21152211115153 has 2 divisors, whose sum is σ = 21152211115154. Its totient is φ = 21152211115152.

The previous prime is 21152211115129. The next prime is 21152211115177. The reversal of 21152211115153 is 35151111225112.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (21152211115129) and next prime (21152211115177).

It can be written as a sum of positive squares in only one way, i.e., 11593126097424 + 9559085017729 = 3404868^2 + 3091777^2 .

It is a cyclic number.

It is not a de Polignac number, because 21152211115153 - 2⁴¹ = 18953187859601 is a prime.

It is not a weakly prime, because it can be changed into another prime (21152211110153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10576105557576 + 10576105557577.

It is an arithmetic number, because the mean of its divisors is an integer number (10576105557577).

Almost surely, 2^{21152211115153} is an apocalyptic number.

It is an amenable number.

21152211115153 is a deficient number, since it is larger than the sum of its proper divisors (1).

21152211115153 is an equidigital number, since it uses as much as digits as its factorization.

21152211115153 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3000, while the sum is 31.

The spelling of 21152211115153 in words is "twenty-one trillion, one hundred fifty-two billion, two hundred eleven million, one hundred fifteen thousand, one hundred fifty-three".