101200020 has 24 divisors (see below), whose sum is σ = 283360224. Its totient is φ = 26986656.

The previous prime is 101200007. The next prime is 101200051. The reversal of 101200020 is 20002101.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (6).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a junction number, because it is equal to n+sod(n) for n = 101199981 and 101200008.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 843274 + ... + 843393.

It is an arithmetic number, because the mean of its divisors is an integer number (11806676).

Almost surely, 2^101200020 is an apocalyptic number.

101200020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101200020 is an abundant number, since it is smaller than the sum of its proper divisors (182160204).

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

101200020 is a wasteful number, since it uses less digits than its factorization.

101200020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1686679 (or 1686677 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 6.

The square root of 101200020 is about 10059.8220660208. The cubic root of 101200020 is about 466.0081721691.

Adding to 101200020 its reverse (20002101), we get a palindrome (121202121).

The spelling of 101200020 in words is "one hundred one million, two hundred thousand, twenty".