21211222212269 has 2 divisors, whose sum is σ = 21211222212270. Its totient is φ = 21211222212268.

The previous prime is 21211222212181. The next prime is 21211222212319. The reversal of 21211222212269 is 96221222211212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21134569645225 + 76652567044 = 4597235^2 + 276862^2 .

It is a cyclic number.

It is not a de Polignac number, because 21211222212269 - 2¹⁶ = 21211222146733 is a prime.

It is a super-3 number, since 3×21211222212269³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21211522212269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605611106134 + 10605611106135.

It is an arithmetic number, because the mean of its divisors is an integer number (10605611106135).

Almost surely, 2^{21211222212269} is an apocalyptic number.

It is an amenable number.

21211222212269 is a deficient number, since it is larger than the sum of its proper divisors (1).

21211222212269 is an equidigital number, since it uses as much as digits as its factorization.

21211222212269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 35.

The spelling of 21211222212269 in words is "twenty-one trillion, two hundred eleven billion, two hundred twenty-two million, two hundred twelve thousand, two hundred sixty-nine".