21121022100163 has 2 divisors, whose sum is σ = 21121022100164. Its totient is φ = 21121022100162.

The previous prime is 21121022100127. The next prime is 21121022100203. The reversal of 21121022100163 is 36100122012112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21121022100163 - 2²¹ = 21121020003011 is a prime.

It is not a weakly prime, because it can be changed into another prime (21121022100103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560511050081 + 10560511050082.

It is an arithmetic number, because the mean of its divisors is an integer number (10560511050082).

Almost surely, 2^{21121022100163} is an apocalyptic number.

21121022100163 is a deficient number, since it is larger than the sum of its proper divisors (1).

21121022100163 is an equidigital number, since it uses as much as digits as its factorization.

21121022100163 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 21121022100163 its reverse (36100122012112), we get a palindrome (57221144112275).

The spelling of 21121022100163 in words is "twenty-one trillion, one hundred twenty-one billion, twenty-two million, one hundred thousand, one hundred sixty-three".