21144100024087 has 2 divisors, whose sum is σ = 21144100024088. Its totient is φ = 21144100024086.

The previous prime is 21144100024001. The next prime is 21144100024093. The reversal of 21144100024087 is 78042000144112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21144100024087 - 2²³ = 21144091635479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21144100084087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10572050012043 + 10572050012044.

It is an arithmetic number, because the mean of its divisors is an integer number (10572050012044).

Almost surely, 2^{21144100024087} is an apocalyptic number.

21144100024087 is a deficient number, since it is larger than the sum of its proper divisors (1).

21144100024087 is an equidigital number, since it uses as much as digits as its factorization.

21144100024087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14336, while the sum is 34.

Adding to 21144100024087 its reverse (78042000144112), we get a palindrome (99186100168199).

The spelling of 21144100024087 in words is "twenty-one trillion, one hundred forty-four billion, one hundred million, twenty-four thousand, eighty-seven".