101442421 has 2 divisors, whose sum is σ = 101442422. Its totient is φ = 101442420.

The previous prime is 101442413. The next prime is 101442427. The reversal of 101442421 is 124244101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89984196 + 11458225 = 9486^2 + 3385^2 .

It is a cyclic number.

It is not a de Polignac number, because 101442421 - 2³ = 101442413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101442427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50721210 + 50721211.

It is an arithmetic number, because the mean of its divisors is an integer number (50721211).

Almost surely, 2^101442421 is an apocalyptic number.

It is an amenable number.

101442421 is a deficient number, since it is larger than the sum of its proper divisors (1).

101442421 is an equidigital number, since it uses as much as digits as its factorization.

101442421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 101442421 is about 10071.8628366355. The cubic root of 101442421 is about 466.3799467212.

Adding to 101442421 its reverse (124244101), we get a palindrome (225686522).

The spelling of 101442421 in words is "one hundred one million, four hundred forty-two thousand, four hundred twenty-one".