101230021 has 2 divisors, whose sum is σ = 101230022. Its totient is φ = 101230020.

The previous prime is 101230001. The next prime is 101230067. The reversal of 101230021 is 120032101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81993025 + 19236996 = 9055^2 + 4386^2 .

It is a cyclic number.

It is not a de Polignac number, because 101230021 - 2¹³ = 101221829 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101230001) 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, 50615010 + 50615011.

It is an arithmetic number, because the mean of its divisors is an integer number (50615011).

Almost surely, 2^101230021 is an apocalyptic number.

It is an amenable number.

101230021 is a deficient number, since it is larger than the sum of its proper divisors (1).

101230021 is an equidigital number, since it uses as much as digits as its factorization.

101230021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 101230021 is about 10061.3130852787. The cubic root of 101230021 is about 466.0542173835.

Adding to 101230021 its reverse (120032101), we get a palindrome (221262122).

The spelling of 101230021 in words is "one hundred one million, two hundred thirty thousand, twenty-one".