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12011220187 is a prime number
BaseRepresentation
bin10110010111110110…
…01010110011011011
31011000002020012112221
423023323022303123
5144044333021222
65303510044511
7603435454441
oct131373126333
934002205487
1012011220187
11510402555a
1223b2649737
1311955928a5
1481d2dcb91
154a473a0c7
hex2cbecacdb

12011220187 has 2 divisors, whose sum is σ = 12011220188. Its totient is φ = 12011220186.

The previous prime is 12011220167. The next prime is 12011220197. The reversal of 12011220187 is 78102211021.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12011220187 - 219 = 12010695899 is a prime.

It is not a weakly prime, because it can be changed into another prime (12011220107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6005610093 + 6005610094.

It is an arithmetic number, because the mean of its divisors is an integer number (6005610094).

Almost surely, 212011220187 is an apocalyptic number.

12011220187 is a deficient number, since it is larger than the sum of its proper divisors (1).

12011220187 is an equidigital number, since it uses as much as digits as its factorization.

12011220187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 25.

The spelling of 12011220187 in words is "twelve billion, eleven million, two hundred twenty thousand, one hundred eighty-seven".