10221090 has 64 divisors (see below), whose sum is σ = 27371520. Its totient is φ = 2421440.

The previous prime is 10221083. The next prime is 10221091. The reversal of 10221090 is 9012201.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (10221091) 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 31 ways as a sum of consecutive naturals, for example, 15181 + ... + 15839.

It is an arithmetic number, because the mean of its divisors is an integer number (427680).

Almost surely, 2^10221090 is an apocalyptic number.

10221090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 10221090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13685760).

10221090 is an abundant number, since it is smaller than the sum of its proper divisors (17150430).

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

10221090 is a wasteful number, since it uses less digits than its factorization.

10221090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 10221090 is about 3197.0439471487. The cubic root of 10221090 is about 217.0196560306.

Adding to 10221090 its reverse (9012201), we get a palindrome (19233291).

It can be divided in two parts, 1022 and 1090, that added together give a palindrome (2112).

The spelling of 10221090 in words is "ten million, two hundred twenty-one thousand, ninety".