101206121 has 2 divisors, whose sum is σ = 101206122. Its totient is φ = 101206120.

The previous prime is 101206099. The next prime is 101206123. The reversal of 101206121 is 121602101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65934400 + 35271721 = 8120^2 + 5939^2 .

It is an emirp because it is prime and its reverse (121602101) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101206121 is a prime.

Together with 101206123, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 101206096 and 101206105.

It is not a weakly prime, because it can be changed into another prime (101206123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50603060 + 50603061.

It is an arithmetic number, because the mean of its divisors is an integer number (50603061).

Almost surely, 2^101206121 is an apocalyptic number.

It is an amenable number.

101206121 is a deficient number, since it is larger than the sum of its proper divisors (1).

101206121 is an equidigital number, since it uses as much as digits as its factorization.

101206121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 101206121 is about 10060.1252974304. The cubic root of 101206121 is about 466.0175366558.

Adding to 101206121 its reverse (121602101), we get a palindrome (222808222).

The spelling of 101206121 in words is "one hundred one million, two hundred six thousand, one hundred twenty-one".