101430521 has 2 divisors, whose sum is σ = 101430522. Its totient is φ = 101430520.

The previous prime is 101430503. The next prime is 101430523. The reversal of 101430521 is 125034101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98406400 + 3024121 = 9920^2 + 1739^2 .

It is a cyclic number.

It is not a de Polignac number, because 101430521 - 2⁶ = 101430457 is a prime.

Together with 101430523, it forms a pair of twin primes.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 101430521.

It is not a weakly prime, because it can be changed into another prime (101430523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50715260 + 50715261.

It is an arithmetic number, because the mean of its divisors is an integer number (50715261).

Almost surely, 2^101430521 is an apocalyptic number.

It is an amenable number.

101430521 is a deficient number, since it is larger than the sum of its proper divisors (1).

101430521 is an equidigital number, since it uses as much as digits as its factorization.

101430521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 101430521 is about 10071.2720646401. The cubic root of 101430521 is about 466.3617093200.

Adding to 101430521 its reverse (125034101), we get a palindrome (226464622).

The spelling of 101430521 in words is "one hundred one million, four hundred thirty thousand, five hundred twenty-one".