10821267269 has 2 divisors, whose sum is σ = 10821267270. Its totient is φ = 10821267268.

The previous prime is 10821267221. The next prime is 10821267299. The reversal of 10821267269 is 96276212801.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9972419044 + 848848225 = 99862^2 + 29135^2 .

It is a cyclic number.

It is not a de Polignac number, because 10821267269 - 2³² = 6526299973 is a prime.

It is a super-2 number, since 2×10821267269² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10821267299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5410633634 + 5410633635.

It is an arithmetic number, because the mean of its divisors is an integer number (5410633635).

Almost surely, 2^10821267269 is an apocalyptic number.

It is an amenable number.

10821267269 is a deficient number, since it is larger than the sum of its proper divisors (1).

10821267269 is an equidigital number, since it uses as much as digits as its factorization.

10821267269 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 44.

The spelling of 10821267269 in words is "ten billion, eight hundred twenty-one million, two hundred sixty-seven thousand, two hundred sixty-nine".