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1200100100220 = 22355726138221
BaseRepresentation
bin10001011101101011100…
…010100100100001111100
311020201200001001201200000
4101131223202210201330
5124130301111201340
62315152434034300
7152463412353300
oct21355342444174
94221601051600
101200100100220
11422a6124694a
12174707118990
1389227264cc8
1442129943d00
152133d8aed30
hex1176b8a487c

1200100100220 has 432 divisors, whose sum is σ = 4399176364128. Its totient is φ = 273827796480.

The previous prime is 1200100100189. The next prime is 1200100100293. The reversal of 1200100100220 is 220010010021.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 145975710 + ... + 145983930.

Almost surely, 21200100100220 is an apocalyptic number.

1200100100220 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 1200100100220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2199588182064).

1200100100220 is an abundant number, since it is smaller than the sum of its proper divisors (3199076263908).

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

1200100100220 is a wasteful number, since it uses less digits than its factorization.

1200100100220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8872 (or 8851 counting only the distinct ones).

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

Adding to 1200100100220 its reverse (220010010021), we get a palindrome (1420110110241).

The spelling of 1200100100220 in words is "one trillion, two hundred billion, one hundred million, one hundred thousand, two hundred twenty".