22111065904381 has 2 divisors, whose sum is σ = 22111065904382. Its totient is φ = 22111065904380.

The previous prime is 22111065904373. The next prime is 22111065904493. The reversal of 22111065904381 is 18340956011122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21252413481156 + 858652423225 = 4610034^2 + 926635^2 .

It is a cyclic number.

It is not a de Polignac number, because 22111065904381 - 2³ = 22111065904373 is a prime.

It is a super-2 number, since 2×22111065904381² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22111065904351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11055532952190 + 11055532952191.

It is an arithmetic number, because the mean of its divisors is an integer number (11055532952191).

Almost surely, 2^{22111065904381} is an apocalyptic number.

It is an amenable number.

22111065904381 is a deficient number, since it is larger than the sum of its proper divisors (1).

22111065904381 is an equidigital number, since it uses as much as digits as its factorization.

22111065904381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 43.

The spelling of 22111065904381 in words is "twenty-two trillion, one hundred eleven billion, sixty-five million, nine hundred four thousand, three hundred eighty-one".