101231320 has 16 divisors (see below), whose sum is σ = 227770560. Its totient is φ = 40492512.

The previous prime is 101231293. The next prime is 101231321. The reversal of 101231320 is 23132101.

It is a self number, because there is not a number n which added to its sum of digits gives 101231320.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101231321) 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 3 ways as a sum of consecutive naturals, for example, 1265352 + ... + 1265431.

It is an arithmetic number, because the mean of its divisors is an integer number (14235660).

Almost surely, 2^101231320 is an apocalyptic number.

101231320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101231320 is an abundant number, since it is smaller than the sum of its proper divisors (126539240).

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

101231320 is a wasteful number, since it uses less digits than its factorization.

101231320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2530794 (or 2530790 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 101231320 is about 10061.3776392699. The cubic root of 101231320 is about 466.0562108693.

Adding to 101231320 its reverse (23132101), we get a palindrome (124363421).

The spelling of 101231320 in words is "one hundred one million, two hundred thirty-one thousand, three hundred twenty".