154212101 has 2 divisors, whose sum is σ = 154212102. Its totient is φ = 154212100.

The previous prime is 154212067. The next prime is 154212103. The reversal of 154212101 is 101212451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140896900 + 13315201 = 11870^2 + 3649^2 .

It is a cyclic number.

It is not a de Polignac number, because 154212101 - 2²² = 150017797 is a prime.

It is a Sophie Germain prime.

Together with 154212103, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 154212101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (154212103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77106050 + 77106051.

It is an arithmetic number, because the mean of its divisors is an integer number (77106051).

Almost surely, 2^154212101 is an apocalyptic number.

It is an amenable number.

154212101 is a deficient number, since it is larger than the sum of its proper divisors (1).

154212101 is an equidigital number, since it uses as much as digits as its factorization.

154212101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 154212101 is about 12418.2164983543. The cubic root of 154212101 is about 536.2568070743.

Adding to 154212101 its reverse (101212451), we get a palindrome (255424552).

The spelling of 154212101 in words is "one hundred fifty-four million, two hundred twelve thousand, one hundred one".