101212202121109 has 2 divisors, whose sum is σ = 101212202121110. Its totient is φ = 101212202121108.

The previous prime is 101212202120987. The next prime is 101212202121137. The reversal of 101212202121109 is 901121202212101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91656746505009 + 9555455616100 = 9573753^2 + 3091190^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101212202121109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101212202121169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50606101060554 + 50606101060555.

It is an arithmetic number, because the mean of its divisors is an integer number (50606101060555).

Almost surely, 2^{101212202121109} is an apocalyptic number.

It is an amenable number.

101212202121109 is a deficient number, since it is larger than the sum of its proper divisors (1).

101212202121109 is an equidigital number, since it uses as much as digits as its factorization.

101212202121109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 25.

The spelling of 101212202121109 in words is "one hundred one trillion, two hundred twelve billion, two hundred two million, one hundred twenty-one thousand, one hundred nine".