101211225 has 24 divisors (see below), whose sum is σ = 167861280. Its totient is φ = 53809920.

The previous prime is 101211221. The next prime is 101211241. The reversal of 101211225 is 522112101.

It is not a de Polignac number, because 101211225 - 2² = 101211221 is a prime.

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 (101211221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24081 + ... + 27969.

It is an arithmetic number, because the mean of its divisors is an integer number (6994220).

Almost surely, 2^101211225 is an apocalyptic number.

101211225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

101211225 is a deficient number, since it is larger than the sum of its proper divisors (66650055).

101211225 is a wasteful number, since it uses less digits than its factorization.

101211225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4249 (or 4244 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 15.

The square root of 101211225 is about 10060.3789690051. The cubic root of 101211225 is about 466.0253705480.

Adding to 101211225 its reverse (522112101), we get a palindrome (623323326).

The spelling of 101211225 in words is "one hundred one million, two hundred eleven thousand, two hundred twenty-five".