20021110002169 has 2 divisors, whose sum is σ = 20021110002170. Its totient is φ = 20021110002168.

The previous prime is 20021110002163. The next prime is 20021110002199. The reversal of 20021110002169 is 96120001112002.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16897336545769 + 3123773456400 = 4110637^2 + 1767420^2 .

It is a cyclic number.

It is not a de Polignac number, because 20021110002169 - 2⁹ = 20021110001657 is a prime.

It is a super-2 number, since 2×20021110002169² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20021110002163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010555001084 + 10010555001085.

It is an arithmetic number, because the mean of its divisors is an integer number (10010555001085).

Almost surely, 2^{20021110002169} is an apocalyptic number.

It is an amenable number.

20021110002169 is a deficient number, since it is larger than the sum of its proper divisors (1).

20021110002169 is an equidigital number, since it uses as much as digits as its factorization.

20021110002169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 25.

The spelling of 20021110002169 in words is "twenty trillion, twenty-one billion, one hundred ten million, two thousand, one hundred sixty-nine".