101201521 has 2 divisors, whose sum is σ = 101201522. Its totient is φ = 101201520.

The previous prime is 101201497. The next prime is 101201531. The reversal of 101201521 is 125102101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94770225 + 6431296 = 9735^2 + 2536^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101201521 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (101201531) 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, 50600760 + 50600761.

It is an arithmetic number, because the mean of its divisors is an integer number (50600761).

Almost surely, 2^101201521 is an apocalyptic number.

It is an amenable number.

101201521 is a deficient number, since it is larger than the sum of its proper divisors (1).

101201521 is an equidigital number, since it uses as much as digits as its factorization.

101201521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20, while the sum is 13.

The square root of 101201521 is about 10059.8966694494. The cubic root of 101201521 is about 466.0104761041.

Adding to 101201521 its reverse (125102101), we get a palindrome (226303622).

It can be divided in two parts, 1012015 and 21, that added together give a square (1012036 = 1006²).

The spelling of 101201521 in words is "one hundred one million, two hundred one thousand, five hundred twenty-one".