1200000101 has 2 divisors, whose sum is σ = 1200000102. Its totient is φ = 1200000100.

The previous prime is 1200000079. The next prime is 1200000121. The reversal of 1200000101 is 1010000021.

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., 676780225 + 523219876 = 26015^2 + 22874^2 .

It is an emirp because it is prime and its reverse (1010000021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1200000101 - 2²² = 1195805797 is a prime.

It is a Sophie Germain prime.

1200000101 is a modest number, since divided by 101 gives 12 as remainder.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1200000121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600000050 + 600000051.

It is an arithmetic number, because the mean of its divisors is an integer number (600000051).

Almost surely, 2^1200000101 is an apocalyptic number.

It is an amenable number.

1200000101 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200000101 is an equidigital number, since it uses as much as digits as its factorization.

1200000101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2, while the sum is 5.

The square root of 1200000101 is about 34641.0176091869. The cubic root of 1200000101 is about 1062.6585989961.

Adding to 1200000101 its reverse (1010000021), we get a palindrome (2210000122).

The spelling of 1200000101 in words is "one billion, two hundred million, one hundred one", and thus it is an aban number.