21603214127087 has 2 divisors, whose sum is σ = 21603214127088. Its totient is φ = 21603214127086.

The previous prime is 21603214127063. The next prime is 21603214127101. The reversal of 21603214127087 is 78072141230612.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21603214127087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21603214127687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10801607063543 + 10801607063544.

It is an arithmetic number, because the mean of its divisors is an integer number (10801607063544).

Almost surely, 2^{21603214127087} is an apocalyptic number.

21603214127087 is a deficient number, since it is larger than the sum of its proper divisors (1).

21603214127087 is an equidigital number, since it uses as much as digits as its factorization.

21603214127087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 225792, while the sum is 44.

Adding to 21603214127087 its reverse (78072141230612), we get a palindrome (99675355357699).

The spelling of 21603214127087 in words is "twenty-one trillion, six hundred three billion, two hundred fourteen million, one hundred twenty-seven thousand, eighty-seven".