10501821 has 48 divisors (see below), whose sum is σ = 17641728. Its totient is φ = 5961600.

The previous prime is 10501819. The next prime is 10501831. The reversal of 10501821 is 12810501.

10501821 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10501821 - 2¹ = 10501819 is a prime.

It is a super-2 number, since 2×10501821² = 220576488632082, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10501794 and 10501803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10501811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 172131 + ... + 172191.

It is an arithmetic number, because the mean of its divisors is an integer number (367536).

Almost surely, 2^10501821 is an apocalyptic number.

10501821 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10501821 is a deficient number, since it is larger than the sum of its proper divisors (7139907).

10501821 is a wasteful number, since it uses less digits than its factorization.

10501821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162 (or 159 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

The square root of 10501821 is about 3240.6513234225. The cubic root of 10501821 is about 218.9886151585.

The spelling of 10501821 in words is "ten million, five hundred one thousand, eight hundred twenty-one".