21120001102169 has 2 divisors, whose sum is σ = 21120001102170. Its totient is φ = 21120001102168.

The previous prime is 21120001102159. The next prime is 21120001102217. The reversal of 21120001102169 is 96120110002112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10746673916944 + 10373327185225 = 3278212^2 + 3220765^2 .

It is a cyclic number.

It is not a de Polignac number, because 21120001102169 - 2²⁴ = 21119984324953 is a prime.

It is a super-2 number, since 2×21120001102169² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21120001102159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560000551084 + 10560000551085.

It is an arithmetic number, because the mean of its divisors is an integer number (10560000551085).

Almost surely, 2^{21120001102169} is an apocalyptic number.

It is an amenable number.

21120001102169 is a deficient number, since it is larger than the sum of its proper divisors (1).

21120001102169 is an equidigital number, since it uses as much as digits as its factorization.

21120001102169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 26.

The spelling of 21120001102169 in words is "twenty-one trillion, one hundred twenty billion, one million, one hundred two thousand, one hundred sixty-nine".