101001121909 has 2 divisors, whose sum is σ = 101001121910. Its totient is φ = 101001121908.

The previous prime is 101001121847. The next prime is 101001122149. The reversal of 101001121909 is 909121100101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91333906225 + 9667215684 = 302215^2 + 98322^2 .

It is a cyclic number.

It is not a de Polignac number, because 101001121909 - 2²³ = 100992733301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101001121009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50500560954 + 50500560955.

It is an arithmetic number, because the mean of its divisors is an integer number (50500560955).

Almost surely, 2^101001121909 is an apocalyptic number.

It is an amenable number.

101001121909 is a deficient number, since it is larger than the sum of its proper divisors (1).

101001121909 is an equidigital number, since it uses as much as digits as its factorization.

101001121909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 25.

The spelling of 101001121909 in words is "one hundred one billion, one million, one hundred twenty-one thousand, nine hundred nine".