101212144 has 60 divisors (see below), whose sum is σ = 225016848. Its totient is φ = 43985920.

The previous prime is 101212141. The next prime is 101212207. The reversal of 101212144 is 441212101.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101212141) 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 11 ways as a sum of consecutive naturals, for example, 43392 + ... + 45664.

Almost surely, 2^101212144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 101212144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112508424).

101212144 is an abundant number, since it is smaller than the sum of its proper divisors (123804704).

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

101212144 is a wasteful number, since it uses less digits than its factorization.

101212144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2326 (or 2309 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 101212144 is about 10060.4246431252. The cubic root of 101212144 is about 466.0267810503.

Adding to 101212144 its reverse (441212101), we get a palindrome (542424245).

The spelling of 101212144 in words is "one hundred one million, two hundred twelve thousand, one hundred forty-four".