10721771 has 2 divisors, whose sum is σ = 10721772. Its totient is φ = 10721770.

The previous prime is 10721761. The next prime is 10721773. The reversal of 10721771 is 17712701.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 10721771 - 2¹⁸ = 10459627 is a prime.

It is a super-2 number, since 2×10721771² = 229912746752882, which contains 22 as substring.

Together with 10721773, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 10721771.

It is not a weakly prime, because it can be changed into another prime (10721773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5360885 + 5360886.

It is an arithmetic number, because the mean of its divisors is an integer number (5360886).

Almost surely, 2^10721771 is an apocalyptic number.

10721771 is a deficient number, since it is larger than the sum of its proper divisors (1).

10721771 is an equidigital number, since it uses as much as digits as its factorization.

10721771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 686, while the sum is 26.

The square root of 10721771 is about 3274.4115501873. The cubic root of 10721771 is about 220.5068959164.

The spelling of 10721771 in words is "ten million, seven hundred twenty-one thousand, seven hundred seventy-one".