22211573381 has 2 divisors, whose sum is σ = 22211573382. Its totient is φ = 22211573380.

The previous prime is 22211573347. The next prime is 22211573383. The reversal of 22211573381 is 18337511222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13123764481 + 9087808900 = 114559^2 + 95330^2 .

It is a cyclic number.

It is not a de Polignac number, because 22211573381 - 2³⁰ = 21137831557 is a prime.

It is a super-2 number, since 2×22211573381² (a number of 21 digits) contains 22 as substring.

Together with 22211573383, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22211573383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11105786690 + 11105786691.

It is an arithmetic number, because the mean of its divisors is an integer number (11105786691).

Almost surely, 2^22211573381 is an apocalyptic number.

It is an amenable number.

22211573381 is a deficient number, since it is larger than the sum of its proper divisors (1).

22211573381 is an equidigital number, since it uses as much as digits as its factorization.

22211573381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 35.

The spelling of 22211573381 in words is "twenty-two billion, two hundred eleven million, five hundred seventy-three thousand, three hundred eighty-one".