21350066371 has 2 divisors, whose sum is σ = 21350066372. Its totient is φ = 21350066370.

The previous prime is 21350066359. The next prime is 21350066401. The reversal of 21350066371 is 17366005312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21350066371 - 2²¹ = 21347969219 is a prime.

It is a super-2 number, since 2×21350066371² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21350066351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10675033185 + 10675033186.

It is an arithmetic number, because the mean of its divisors is an integer number (10675033186).

Almost surely, 2^21350066371 is an apocalyptic number.

21350066371 is a deficient number, since it is larger than the sum of its proper divisors (1).

21350066371 is an equidigital number, since it uses as much as digits as its factorization.

21350066371 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 34.

The spelling of 21350066371 in words is "twenty-one billion, three hundred fifty million, sixty-six thousand, three hundred seventy-one".