21003853050827 has 2 divisors, whose sum is σ = 21003853050828. Its totient is φ = 21003853050826.

The previous prime is 21003853050809. The next prime is 21003853050871. The reversal of 21003853050827 is 72805035830012.

It is an a-pointer prime, because the next prime (21003853050871) can be obtained adding 21003853050827 to its sum of digits (44).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21003853050827 - 2⁸ = 21003853050571 is a prime.

It is not a weakly prime, because it can be changed into another prime (21003853050127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501926525413 + 10501926525414.

It is an arithmetic number, because the mean of its divisors is an integer number (10501926525414).

Almost surely, 2^{21003853050827} is an apocalyptic number.

21003853050827 is a deficient number, since it is larger than the sum of its proper divisors (1).

21003853050827 is an equidigital number, since it uses as much as digits as its factorization.

21003853050827 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 403200, while the sum is 44.

Adding to 21003853050827 its reverse (72805035830012), we get a palindrome (93808888880839).

The spelling of 21003853050827 in words is "twenty-one trillion, three billion, eight hundred fifty-three million, fifty thousand, eight hundred twenty-seven".