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121451999 is a prime number
BaseRepresentation
bin1110011110100…
…11010111011111
322110112101211012
413033103113133
5222042430444
620015045435
73003216314
oct717232737
9273471735
10121451999
1162613759
123481087b
131c214ab6
14121b6d0b
15a9e0b9e
hex73d35df

121451999 has 2 divisors, whose sum is σ = 121452000. Its totient is φ = 121451998.

The previous prime is 121451989. The next prime is 121452011. The reversal of 121451999 is 999154121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-121451999 is a prime.

It is a super-2 number, since 2×1214519992 = 29501176122192002, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121451959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60725999 + 60726000.

It is an arithmetic number, because the mean of its divisors is an integer number (60726000).

Almost surely, 2121451999 is an apocalyptic number.

121451999 is a deficient number, since it is larger than the sum of its proper divisors (1).

121451999 is an equidigital number, since it uses as much as digits as its factorization.

121451999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29160, while the sum is 41.

The square root of 121451999 is about 11020.5262578518. The cubic root of 121451999 is about 495.2238541298.

The spelling of 121451999 in words is "one hundred twenty-one million, four hundred fifty-one thousand, nine hundred ninety-nine".