101242421 has 8 divisors (see below), whose sum is σ = 115772160. Its totient is φ = 86729328.

The previous prime is 101242417. The next prime is 101242423. The reversal of 101242421 is 124242101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 101242421 - 2² = 101242417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 101242421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101242423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14420 + ... + 20258.

It is an arithmetic number, because the mean of its divisors is an integer number (14471520).

Almost surely, 2^101242421 is an apocalyptic number.

It is an amenable number.

101242421 is a deficient number, since it is larger than the sum of its proper divisors (14529739).

101242421 is an equidigital number, since it uses as much as digits as its factorization.

101242421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8323.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 101242421 is about 10061.9292881634. The cubic root of 101242421 is about 466.0732461139.

Adding to 101242421 its reverse (124242101), we get a palindrome (225484522).

The spelling of 101242421 in words is "one hundred one million, two hundred forty-two thousand, four hundred twenty-one".