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BaseRepresentation
bin111000011100011001…
…1100000110001001011
3102120212110222021111112
41300320303200301023
53441220300040242
6131403432120535
711520514644323
oct1607063406113
9376773867445
10121212111947
1147451093833
121b5a983614b
13b57935c784
145c1c30a283
1532465d4c82
hex1c38ce0c4b

121212111947 has 2 divisors, whose sum is σ = 121212111948. Its totient is φ = 121212111946.

The previous prime is 121212111931. The next prime is 121212111959. The reversal of 121212111947 is 749111212121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121212111947 - 24 = 121212111931 is a prime.

It is not a weakly prime, because it can be changed into another prime (121212111967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60606055973 + 60606055974.

It is an arithmetic number, because the mean of its divisors is an integer number (60606055974).

Almost surely, 2121212111947 is an apocalyptic number.

121212111947 is a deficient number, since it is larger than the sum of its proper divisors (1).

121212111947 is an equidigital number, since it uses as much as digits as its factorization.

121212111947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 32.

The spelling of 121212111947 in words is "one hundred twenty-one billion, two hundred twelve million, one hundred eleven thousand, nine hundred forty-seven".