101242121 has 2 divisors, whose sum is σ = 101242122. Its totient is φ = 101242120.

The previous prime is 101242117. The next prime is 101242139. The reversal of 101242121 is 121242101.

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., 69488896 + 31753225 = 8336^2 + 5635^2 .

It is an emirp because it is prime and its reverse (121242101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 101242121 - 2² = 101242117 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 101242096 and 101242105.

It is not a weakly prime, because it can be changed into another prime (101242111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50621060 + 50621061.

It is an arithmetic number, because the mean of its divisors is an integer number (50621061).

Almost surely, 2^101242121 is an apocalyptic number.

It is an amenable number.

101242121 is a deficient number, since it is larger than the sum of its proper divisors (1).

101242121 is an equidigital number, since it uses as much as digits as its factorization.

101242121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 101242121 is about 10061.9143804745. The cubic root of 101242121 is about 466.0727857598.

Adding to 101242121 its reverse (121242101), we get a palindrome (222484222).

The spelling of 101242121 in words is "one hundred one million, two hundred forty-two thousand, one hundred twenty-one".