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12020210031 = 37699520423
BaseRepresentation
bin10110011000111010…
…11101100101101111
31011000201010221022010
423030131131211233
5144104133210111
65304430452303
7603605046054
oct131435354557
934021127263
1012020210031
115109105785
1223b5664093
1311973bc71b
1482059d02b
154a5413aa6
hex2cc75d96f

12020210031 has 8 divisors (see below), whose sum is σ = 16029059200. Its totient is φ = 8012417112.

The previous prime is 12020210011. The next prime is 12020210039. The reversal of 12020210031 is 13001202021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12020210031 - 210 = 12020209007 is a prime.

It is a super-2 number, since 2×120202100312 (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12020209989 and 12020210016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12020210039) 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, 237115 + ... + 283308.

It is an arithmetic number, because the mean of its divisors is an integer number (2003632400).

Almost surely, 212020210031 is an apocalyptic number.

12020210031 is a deficient number, since it is larger than the sum of its proper divisors (4008849169).

12020210031 is an equidigital number, since it uses as much as digits as its factorization.

12020210031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528125.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 12020210031 its reverse (13001202021), we get a palindrome (25021412052).

The spelling of 12020210031 in words is "twelve billion, twenty million, two hundred ten thousand, thirty-one".

Divisors: 1 3 7699 23097 520423 1561269 4006736677 12020210031