101001521 has 2 divisors, whose sum is σ = 101001522. Its totient is φ = 101001520.

The previous prime is 101001493. The next prime is 101001599. The reversal of 101001521 is 125100101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63043600 + 37957921 = 7940^2 + 6161^2 .

It is a cyclic number.

It is not a de Polignac number, because 101001521 - 2⁶ = 101001457 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (101001721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50500760 + 50500761.

It is an arithmetic number, because the mean of its divisors is an integer number (50500761).

Almost surely, 2^101001521 is an apocalyptic number.

It is an amenable number.

101001521 is a deficient number, since it is larger than the sum of its proper divisors (1).

101001521 is an equidigital number, since it uses as much as digits as its factorization.

101001521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10, while the sum is 11.

The square root of 101001521 is about 10049.9512934143. The cubic root of 101001521 is about 465.7032884952.

Adding to 101001521 its reverse (125100101), we get a palindrome (226101622).

The spelling of 101001521 in words is "one hundred one million, one thousand, five hundred twenty-one".