10221040 has 20 divisors (see below), whose sum is σ = 23764104. Its totient is φ = 4088384.

The previous prime is 10221037. The next prime is 10221047. The reversal of 10221040 is 4012201.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10221047) 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, 63802 + ... + 63961.

Almost surely, 2^10221040 is an apocalyptic number.

10221040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10221040 is an abundant number, since it is smaller than the sum of its proper divisors (13543064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10221040 is a wasteful number, since it uses less digits than its factorization.

10221040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127776 (or 127770 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 10221040 is about 3197.0361274155. The cubic root of 10221040 is about 217.0193021544.

Adding to 10221040 its reverse (4012201), we get a palindrome (14233241).

The spelling of 10221040 in words is "ten million, two hundred twenty-one thousand, forty".