1210120099 has 2 divisors, whose sum is σ = 1210120100. Its totient is φ = 1210120098.

The previous prime is 1210120057. The next prime is 1210120103. The reversal of 1210120099 is 9900210121.

It is a strong prime.

It is an emirp because it is prime and its reverse (9900210121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1210120099 is a prime.

It is not a weakly prime, because it can be changed into another prime (1210120049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605060049 + 605060050.

It is an arithmetic number, because the mean of its divisors is an integer number (605060050).

Almost surely, 2^1210120099 is an apocalyptic number.

1210120099 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210120099 is an equidigital number, since it uses as much as digits as its factorization.

1210120099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 25.

The square root of 1210120099 is about 34786.7805207668. The cubic root of 1210120099 is about 1065.6374911823.

The spelling of 1210120099 in words is "one billion, two hundred ten million, one hundred twenty thousand, ninety-nine".