10221155 has 12 divisors (see below), whose sum is σ = 14268240. Its totient is φ = 7008624.

The previous prime is 10221151. The next prime is 10221157. The reversal of 10221155 is 55112201.

It is not a de Polignac number, because 10221155 - 2² = 10221151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (10221151) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20615 + ... + 21104.

It is an arithmetic number, because the mean of its divisors is an integer number (1189020).

Almost surely, 2^10221155 is an apocalyptic number.

10221155 is a deficient number, since it is larger than the sum of its proper divisors (4047085).

10221155 is an equidigital number, since it uses as much as digits as its factorization.

10221155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41738 (or 41731 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 10221155 is about 3197.0541127732. The cubic root of 10221155 is about 217.0201160679.

Adding to 10221155 its reverse (55112201), we get a palindrome (65333356).

The spelling of 10221155 in words is "ten million, two hundred twenty-one thousand, one hundred fifty-five".