21211112022169 has 2 divisors, whose sum is σ = 21211112022170. Its totient is φ = 21211112022168.

The previous prime is 21211112022097. The next prime is 21211112022209. The reversal of 21211112022169 is 96122021111212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21046853659225 + 164258362944 = 4587685^2 + 405288^2 .

It is a cyclic number.

It is not a de Polignac number, because 21211112022169 - 2²¹ = 21211109925017 is a prime.

It is a super-2 number, since 2×21211112022169² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21211112022169.

It is not a weakly prime, because it can be changed into another prime (21211112022469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605556011084 + 10605556011085.

It is an arithmetic number, because the mean of its divisors is an integer number (10605556011085).

Almost surely, 2^{21211112022169} is an apocalyptic number.

It is an amenable number.

21211112022169 is a deficient number, since it is larger than the sum of its proper divisors (1).

21211112022169 is an equidigital number, since it uses as much as digits as its factorization.

21211112022169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 31.

The spelling of 21211112022169 in words is "twenty-one trillion, two hundred eleven billion, one hundred twelve million, twenty-two thousand, one hundred sixty-nine".