10921901 has 2 divisors, whose sum is σ = 10921902. Its totient is φ = 10921900.

The previous prime is 10921891. The next prime is 10921913. The reversal of 10921901 is 10912901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10530025 + 391876 = 3245^2 + 626^2 .

It is an emirp because it is prime and its reverse (10912901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10921901 - 2¹⁸ = 10659757 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10921921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5460950 + 5460951.

It is an arithmetic number, because the mean of its divisors is an integer number (5460951).

Almost surely, 2^10921901 is an apocalyptic number.

It is an amenable number.

10921901 is a deficient number, since it is larger than the sum of its proper divisors (1).

10921901 is an equidigital number, since it uses as much as digits as its factorization.

10921901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 23.

The square root of 10921901 is about 3304.8299502395. The cubic root of 10921901 is about 221.8704232607.

The spelling of 10921901 in words is "ten million, nine hundred twenty-one thousand, nine hundred one".