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212200100120 = 23531171129113
BaseRepresentation
bin1100010110100000011…
…1001001000100011000
3202021201120220222121102
43011220013021010120
511434041211200440
6241252224330532
721221342043011
oct3055007110430
9667646828542
10212200100120
1181aa2473a78
1235161473a48
1317019a74728
14a3b050a008
1557be56db15
hex31681c9118

212200100120 has 32 divisors (see below), whose sum is σ = 492851848320. Its totient is φ = 82141973760.

The previous prime is 212200100083. The next prime is 212200100129. The reversal of 212200100120 is 21001002212.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212200100129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85563317 + ... + 85565796.

It is an arithmetic number, because the mean of its divisors is an integer number (15401620260).

Almost surely, 2212200100120 is an apocalyptic number.

212200100120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212200100120 is an abundant number, since it is smaller than the sum of its proper divisors (280651748200).

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

212200100120 is a wasteful number, since it uses less digits than its factorization.

212200100120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171129155 (or 171129151 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 212200100120 its reverse (21001002212), we get a palindrome (233201102332).

The spelling of 212200100120 in words is "two hundred twelve billion, two hundred million, one hundred thousand, one hundred twenty".

Divisors: 1 2 4 5 8 10 20 31 40 62 124 155 248 310 620 1240 171129113 342258226 684516452 855645565 1369032904 1711291130 3422582260 5305002503 6845164520 10610005006 21220010012 26525012515 42440020024 53050025030 106100050060 212200100120