22121111212169 has 2 divisors, whose sum is σ = 22121111212170. Its totient is φ = 22121111212168.

The previous prime is 22121111212159. The next prime is 22121111212171. The reversal of 22121111212169 is 96121211112122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20428926506569 + 1692184705600 = 4519837^2 + 1300840^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22121111212169 is a prime.

It is a super-2 number, since 2×22121111212169² (a number of 27 digits) contains 22 as substring.

Together with 22121111212171, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22121111212159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11060555606084 + 11060555606085.

It is an arithmetic number, because the mean of its divisors is an integer number (11060555606085).

Almost surely, 2^{22121111212169} is an apocalyptic number.

It is an amenable number.

22121111212169 is a deficient number, since it is larger than the sum of its proper divisors (1).

22121111212169 is an equidigital number, since it uses as much as digits as its factorization.

22121111212169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 32.

The spelling of 22121111212169 in words is "twenty-two trillion, one hundred twenty-one billion, one hundred eleven million, two hundred twelve thousand, one hundred sixty-nine".