101120220 has 72 divisors (see below), whose sum is σ = 307826064. Its totient is φ = 26869248.

The previous prime is 101120177. The next prime is 101120221. The reversal of 101120220 is 22021101.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101120221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59827 + ... + 61493.

It is an arithmetic number, because the mean of its divisors is an integer number (4275362).

Almost surely, 2^101120220 is an apocalyptic number.

101120220 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 101120220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153913032).

101120220 is an abundant number, since it is smaller than the sum of its proper divisors (206705844).

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

101120220 is a wasteful number, since it uses less digits than its factorization.

101120220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2019 (or 2014 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 101120220 is about 10055.8550108879. The cubic root of 101120220 is about 465.8856516696.

Adding to 101120220 its reverse (22021101), we get a palindrome (123141321).

The spelling of 101120220 in words is "one hundred one million, one hundred twenty thousand, two hundred twenty".