21152154230153 has 2 divisors, whose sum is σ = 21152154230154. Its totient is φ = 21152154230152.

The previous prime is 21152154230131. The next prime is 21152154230239. The reversal of 21152154230153 is 35103245125112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19854224932864 + 1297929297289 = 4455808^2 + 1139267^2 .

It is a cyclic number.

It is not a de Polignac number, because 21152154230153 - 2¹² = 21152154226057 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (21152154230953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10576077115076 + 10576077115077.

It is an arithmetic number, because the mean of its divisors is an integer number (10576077115077).

Almost surely, 2^{21152154230153} is an apocalyptic number.

It is an amenable number.

21152154230153 is a deficient number, since it is larger than the sum of its proper divisors (1).

21152154230153 is an equidigital number, since it uses as much as digits as its factorization.

21152154230153 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36000, while the sum is 35.

Adding to 21152154230153 its reverse (35103245125112), we get a palindrome (56255399355265).

The spelling of 21152154230153 in words is "twenty-one trillion, one hundred fifty-two billion, one hundred fifty-four million, two hundred thirty thousand, one hundred fifty-three".