10221140 has 12 divisors (see below), whose sum is σ = 21464436. Its totient is φ = 4088448.

The previous prime is 10221091. The next prime is 10221149. The reversal of 10221140 is 4112201.

It can be written as a sum of positive squares in 2 ways, for example, as 3429904 + 6791236 = 1852^2 + 2606^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10221149) 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, 255509 + ... + 255548.

It is an arithmetic number, because the mean of its divisors is an integer number (1788703).

Almost surely, 2^10221140 is an apocalyptic number.

10221140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10221140 is an abundant number, since it is smaller than the sum of its proper divisors (11243296).

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

10221140 is a wasteful number, since it uses less digits than its factorization.

10221140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511066 (or 511064 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 10221140 is about 3197.0517668627. The cubic root of 10221140 is about 217.0200099056.

Adding to 10221140 its reverse (4112201), we get a palindrome (14333341).

The spelling of 10221140 in words is "ten million, two hundred twenty-one thousand, one hundred forty".