200112121009 has 2 divisors, whose sum is σ = 200112121010. Its totient is φ = 200112121008.

The previous prime is 200112120973. The next prime is 200112121019. The reversal of 200112121009 is 900121211002.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 198880321600 + 1231799409 = 445960^2 + 35097^2 .

It is a cyclic number.

It is not a de Polignac number, because 200112121009 - 2⁹ = 200112120497 is a prime.

It is not a weakly prime, because it can be changed into another prime (200112121019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100056060504 + 100056060505.

It is an arithmetic number, because the mean of its divisors is an integer number (100056060505).

Almost surely, 2^200112121009 is an apocalyptic number.

It is an amenable number.

200112121009 is a deficient number, since it is larger than the sum of its proper divisors (1).

200112121009 is an equidigital number, since it uses as much as digits as its factorization.

200112121009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 200112121009 in words is "two hundred billion, one hundred twelve million, one hundred twenty-one thousand, nine".