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12100721189 is a prime number
BaseRepresentation
bin10110100010100001…
…00101101000100101
31011020022122022211212
423101100211220211
5144240241034224
65320424241205
7605603301344
oct132120455045
934208568755
1012100721189
11514a5a5a27
122418610205
1311aac9b66b
1482b159b5b
154ac518d0e
hex2d1425a25

12100721189 has 2 divisors, whose sum is σ = 12100721190. Its totient is φ = 12100721188.

The previous prime is 12100721179. The next prime is 12100721201. The reversal of 12100721189 is 98112700121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9243284164 + 2857437025 = 96142^2 + 53455^2 .

It is a cyclic number.

It is not a de Polignac number, because 12100721189 - 224 = 12083943973 is a prime.

It is a super-3 number, since 3×121007211893 (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12100721179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6050360594 + 6050360595.

It is an arithmetic number, because the mean of its divisors is an integer number (6050360595).

Almost surely, 212100721189 is an apocalyptic number.

It is an amenable number.

12100721189 is a deficient number, since it is larger than the sum of its proper divisors (1).

12100721189 is an equidigital number, since it uses as much as digits as its factorization.

12100721189 is an evil number, because the sum of its binary digits is even.

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

The spelling of 12100721189 in words is "twelve billion, one hundred million, seven hundred twenty-one thousand, one hundred eighty-nine".