21010352267 has 2 divisors, whose sum is σ = 21010352268. Its totient is φ = 21010352266.

The previous prime is 21010352263. The next prime is 21010352347. The reversal of 21010352267 is 76225301012.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21010352267 - 2² = 21010352263 is a prime.

It is not a weakly prime, because it can be changed into another prime (21010352263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505176133 + 10505176134.

It is an arithmetic number, because the mean of its divisors is an integer number (10505176134).

Almost surely, 2^21010352267 is an apocalyptic number.

21010352267 is a deficient number, since it is larger than the sum of its proper divisors (1).

21010352267 is an equidigital number, since it uses as much as digits as its factorization.

21010352267 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 29.

Adding to 21010352267 its reverse (76225301012), we get a palindrome (97235653279).

The spelling of 21010352267 in words is "twenty-one billion, ten million, three hundred fifty-two thousand, two hundred sixty-seven".