101203121 has 4 divisors (see below), whose sum is σ = 102131700. Its totient is φ = 100274544.

The previous prime is 101203099. The next prime is 101203163. The reversal of 101203121 is 121302101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 89397025 + 11806096 = 9455^2 + 3436^2 .

It is a cyclic number.

It is not a de Polignac number, because 101203121 - 2¹⁰ = 101202097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101203181) 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 in 3 ways as a sum of consecutive naturals, for example, 464126 + ... + 464343.

It is an arithmetic number, because the mean of its divisors is an integer number (25532925).

Almost surely, 2^101203121 is an apocalyptic number.

It is an amenable number.

101203121 is a deficient number, since it is larger than the sum of its proper divisors (928579).

101203121 is an equidigital number, since it uses as much as digits as its factorization.

101203121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 928578.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 101203121 is about 10059.9761928148. The cubic root of 101203121 is about 466.0129319724.

Adding to 101203121 its reverse (121302101), we get a palindrome (222505222).

The spelling of 101203121 in words is "one hundred one million, two hundred three thousand, one hundred twenty-one".