101216380 has 72 divisors (see below), whose sum is σ = 227505600. Its totient is φ = 37774464.

The previous prime is 101216371. The next prime is 101216383. The reversal of 101216380 is 83612101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101216383) 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, 1281181 + ... + 1281259.

It is an arithmetic number, because the mean of its divisors is an integer number (3159800).

Almost surely, 2^101216380 is an apocalyptic number.

101216380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 101216380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113752800).

101216380 is an abundant number, since it is smaller than the sum of its proper divisors (126289220).

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

101216380 is a wasteful number, since it uses less digits than its factorization.

101216380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211 (or 162 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 101216380 is about 10060.6351688151. The cubic root of 101216380 is about 466.0332824504.

Adding to 101216380 its reverse (83612101), we get a palindrome (184828481).

The spelling of 101216380 in words is "one hundred one million, two hundred sixteen thousand, three hundred eighty".