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BaseRepresentation
bin10110011010001111…
…10110100001110111
31011001111001111101002
423031013312201313
5144120004302411
65305504553515
7604101360125
oct131507664167
934044044332
1012031322231
115114405515
1223b932289b
1311997b05a6
14821c52915
154a63ab33b
hex2cd1f6877

12031322231 has 2 divisors, whose sum is σ = 12031322232. Its totient is φ = 12031322230.

The previous prime is 12031322167. The next prime is 12031322309. The reversal of 12031322231 is 13222313021.

It is a weak prime.

It is an emirp because it is prime and its reverse (13222313021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12031322231 - 26 = 12031322167 is a prime.

It is a super-2 number, since 2×120313222312 (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12031322431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6015661115 + 6015661116.

It is an arithmetic number, because the mean of its divisors is an integer number (6015661116).

Almost surely, 212031322231 is an apocalyptic number.

12031322231 is a deficient number, since it is larger than the sum of its proper divisors (1).

12031322231 is an equidigital number, since it uses as much as digits as its factorization.

12031322231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 12031322231 its reverse (13222313021), we get a palindrome (25253635252).

The spelling of 12031322231 in words is "twelve billion, thirty-one million, three hundred twenty-two thousand, two hundred thirty-one".