10821971 has 2 divisors, whose sum is σ = 10821972. Its totient is φ = 10821970.

The previous prime is 10821947. The next prime is 10821989. The reversal of 10821971 is 17912801.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 10821971 - 2¹⁰ = 10820947 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (10821931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5410985 + 5410986.

It is an arithmetic number, because the mean of its divisors is an integer number (5410986).

Almost surely, 2^10821971 is an apocalyptic number.

10821971 is a deficient number, since it is larger than the sum of its proper divisors (1).

10821971 is an equidigital number, since it uses as much as digits as its factorization.

10821971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 29.

The square root of 10821971 is about 3289.6764278573. The cubic root of 10821971 is about 221.1916807146.

The spelling of 10821971 in words is "ten million, eight hundred twenty-one thousand, nine hundred seventy-one".