1202111010209 has 2 divisors, whose sum is σ = 1202111010210. Its totient is φ = 1202111010208.

The previous prime is 1202111010179. The next prime is 1202111010251. The reversal of 1202111010209 is 9020101112021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1102300509025 + 99810501184 = 1049905^2 + 315928^2 .

It is an emirp because it is prime and its reverse (9020101112021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1202111010209 - 2¹² = 1202111006113 is a prime.

It is not a weakly prime, because it can be changed into another prime (1202111010509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601055505104 + 601055505105.

It is an arithmetic number, because the mean of its divisors is an integer number (601055505105).

Almost surely, 2^{1202111010209} is an apocalyptic number.

It is an amenable number.

1202111010209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1202111010209 is an equidigital number, since it uses as much as digits as its factorization.

1202111010209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 1202111010209 in words is "one trillion, two hundred two billion, one hundred eleven million, ten thousand, two hundred nine".