10998021 has 4 divisors (see below), whose sum is σ = 14664032. Its totient is φ = 7332012.

The previous prime is 10998019. The next prime is 10998023. The reversal of 10998021 is 12089901.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (10998019) and next prime (10998023).

It is not a de Polignac number, because 10998021 - 2¹ = 10998019 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10998021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10998023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1833001 + ... + 1833006.

It is an arithmetic number, because the mean of its divisors is an integer number (3666008).

Almost surely, 2^10998021 is an apocalyptic number.

It is an amenable number.

10998021 is a deficient number, since it is larger than the sum of its proper divisors (3666011).

10998021 is an equidigital number, since it uses as much as digits as its factorization.

10998021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3666010.

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 10998021 is about 3316.3264314600. The cubic root of 10998021 is about 222.3846711158.

The spelling of 10998021 in words is "ten million, nine hundred ninety-eight thousand, twenty-one".