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1231530453221 is a prime number
BaseRepresentation
bin10001111010111100111…
…011110110100011100101
311100201210110211002111012
4101322330323312203211
5130134133244000341
62341431323352005
7154655321063435
oct21727473664345
94321713732435
101231530453221
1143531a9202a2
1217a819082605
138c195a75413
144386bd222c5
152207cd770eb
hex11ebcef68e5

1231530453221 has 2 divisors, whose sum is σ = 1231530453222. Its totient is φ = 1231530453220.

The previous prime is 1231530453217. The next prime is 1231530453233. The reversal of 1231530453221 is 1223540351321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1137059668900 + 94470784321 = 1066330^2 + 307361^2 .

It is a cyclic number.

It is not a de Polignac number, because 1231530453221 - 22 = 1231530453217 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231530453271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615765226610 + 615765226611.

It is an arithmetic number, because the mean of its divisors is an integer number (615765226611).

Almost surely, 21231530453221 is an apocalyptic number.

It is an amenable number.

1231530453221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231530453221 is an equidigital number, since it uses as much as digits as its factorization.

1231530453221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 32.

The spelling of 1231530453221 in words is "one trillion, two hundred thirty-one billion, five hundred thirty million, four hundred fifty-three thousand, two hundred twenty-one".