10650021 has 4 divisors (see below), whose sum is σ = 14200032. Its totient is φ = 7100012.

The previous prime is 10650011. The next prime is 10650023. The reversal of 10650021 is 12005601.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12005601 = 3 ⋅4001867.

It is a cyclic number.

It is not a de Polignac number, because 10650021 - 2⁷ = 10649893 is a prime.

It is a super-2 number, since 2×10650021² = 226845894600882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10650023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1775001 + ... + 1775006.

It is an arithmetic number, because the mean of its divisors is an integer number (3550008).

Almost surely, 2^10650021 is an apocalyptic number.

It is an amenable number.

10650021 is a deficient number, since it is larger than the sum of its proper divisors (3550011).

10650021 is an equidigital number, since it uses as much as digits as its factorization.

10650021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3550010.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 10650021 is about 3263.4369918845. The cubic root of 10650021 is about 220.0139178523.

Adding to 10650021 its reverse (12005601), we get a palindrome (22655622).

The spelling of 10650021 in words is "ten million, six hundred fifty thousand, twenty-one".