10121121202109 has 2 divisors, whose sum is σ = 10121121202110. Its totient is φ = 10121121202108.

The previous prime is 10121121202063. The next prime is 10121121202141. The reversal of 10121121202109 is 90120212112101.

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., 10121019636025 + 101566084 = 3181355^2 + 10078^2 .

It is a cyclic number.

It is not a de Polignac number, because 10121121202109 - 2³² = 10116826234813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10121121202009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5060560601054 + 5060560601055.

It is an arithmetic number, because the mean of its divisors is an integer number (5060560601055).

Almost surely, 2^{10121121202109} is an apocalyptic number.

It is an amenable number.

10121121202109 is a deficient number, since it is larger than the sum of its proper divisors (1).

10121121202109 is an equidigital number, since it uses as much as digits as its factorization.

10121121202109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 23.

The spelling of 10121121202109 in words is "ten trillion, one hundred twenty-one billion, one hundred twenty-one million, two hundred two thousand, one hundred nine".