Base | Representation |
---|---|
bin | 110111111011110110… |
… | …1100011011111101101 |
3 | 102111001101000211100221 |
4 | 1233313231203133231 |
5 | 3432001211444323 |
6 | 131103221051341 |
7 | 11451454263430 |
oct | 1576755433755 |
9 | 374041024327 |
10 | 120120031213 |
11 | 46a40698376 |
12 | 1b343b56b51 |
13 | b434022560 |
14 | 5b5726d817 |
15 | 31d07b555d |
hex | 1bf7b637ed |
120120031213 has 32 divisors (see below), whose sum is σ = 157679391744. Its totient is φ = 88796362752.
The previous prime is 120120031123. The next prime is 120120031243. The reversal of 120120031213 is 312130021021.
It is not a de Polignac number, because 120120031213 - 225 = 120086476781 is a prime.
It is a super-2 number, since 2×1201200312132 (a number of 23 digits) contains 22 as substring.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (120120031243) by changing a digit.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 71445 + ... + 495322.
It is an arithmetic number, because the mean of its divisors is an integer number (4927480992).
Almost surely, 2120120031213 is an apocalyptic number.
120120031213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.
It is an amenable number.
120120031213 is a deficient number, since it is larger than the sum of its proper divisors (37559360531).
120120031213 is a wasteful number, since it uses less digits than its factorization.
120120031213 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 566941.
The product of its (nonzero) digits is 72, while the sum is 16.
Adding to 120120031213 its reverse (312130021021), we get a palindrome (432250052234).
The spelling of 120120031213 in words is "one hundred twenty billion, one hundred twenty million, thirty-one thousand, two hundred thirteen".
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