21150012154393 has 2 divisors, whose sum is σ = 21150012154394. Its totient is φ = 21150012154392.

The previous prime is 21150012154361. The next prime is 21150012154409. The reversal of 21150012154393 is 39345121005112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18867625441344 + 2282386713049 = 4343688^2 + 1510757^2 .

It is a cyclic number.

It is not a de Polignac number, because 21150012154393 - 2⁵ = 21150012154361 is a prime.

It is not a weakly prime, because it can be changed into another prime (21150012154993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10575006077196 + 10575006077197.

It is an arithmetic number, because the mean of its divisors is an integer number (10575006077197).

Almost surely, 2^{21150012154393} is an apocalyptic number.

It is an amenable number.

21150012154393 is a deficient number, since it is larger than the sum of its proper divisors (1).

21150012154393 is an equidigital number, since it uses as much as digits as its factorization.

21150012154393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 37.

The spelling of 21150012154393 in words is "twenty-one trillion, one hundred fifty billion, twelve million, one hundred fifty-four thousand, three hundred ninety-three".