101211021000121 has 2 divisors, whose sum is σ = 101211021000122. Its totient is φ = 101211021000120.

The previous prime is 101211021000119. The next prime is 101211021000289. The reversal of 101211021000121 is 121000120112101.

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., 85462536714025 + 15748484286096 = 9244595^2 + 3968436^2 .

It is a cyclic number.

It is not a de Polignac number, because 101211021000121 - 2¹ = 101211021000119 is a prime.

Together with 101211021000119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (101211021000101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50605510500060 + 50605510500061.

It is an arithmetic number, because the mean of its divisors is an integer number (50605510500061).

Almost surely, 2^{101211021000121} is an apocalyptic number.

It is an amenable number.

101211021000121 is a deficient number, since it is larger than the sum of its proper divisors (1).

101211021000121 is an equidigital number, since it uses as much as digits as its factorization.

101211021000121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 101211021000121 its reverse (121000120112101), we get a palindrome (222211141112222).

The spelling of 101211021000121 in words is "one hundred one trillion, two hundred eleven billion, twenty-one million, one hundred twenty-one", and thus it is an aban number.