101212101012109 has 2 divisors, whose sum is σ = 101212101012110. Its totient is φ = 101212101012108.

The previous prime is 101212101012089. The next prime is 101212101012173. The reversal of 101212101012109 is 901210101212101.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99805794381225 + 1406306630884 = 9990285^2 + 1185878^2 .

It is a cyclic number.

It is not a de Polignac number, because 101212101012109 - 2³³ = 101203511077517 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 101212101012109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101212101012179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50606050506054 + 50606050506055.

It is an arithmetic number, because the mean of its divisors is an integer number (50606050506055).

Almost surely, 2^{101212101012109} is an apocalyptic number.

It is an amenable number.

101212101012109 is a deficient number, since it is larger than the sum of its proper divisors (1).

101212101012109 is an equidigital number, since it uses as much as digits as its factorization.

101212101012109 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 22.

The spelling of 101212101012109 in words is "one hundred one trillion, two hundred twelve billion, one hundred one million, twelve thousand, one hundred nine".