101422421 has 4 divisors (see below), whose sum is σ = 104694144. Its totient is φ = 98150700.

The previous prime is 101422403. The next prime is 101422463. The reversal of 101422421 is 124224101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 124224101 = 181 ⋅686321.

It is a cyclic number.

It is not a de Polignac number, because 101422421 - 2¹⁸ = 101160277 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 101422421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101422621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1635815 + ... + 1635876.

It is an arithmetic number, because the mean of its divisors is an integer number (26173536).

Almost surely, 2^101422421 is an apocalyptic number.

It is an amenable number.

101422421 is a deficient number, since it is larger than the sum of its proper divisors (3271723).

101422421 is an equidigital number, since it uses as much as digits as its factorization.

101422421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3271722.

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

The square root of 101422421 is about 10070.8699227028. The cubic root of 101422421 is about 466.3492948108.

Adding to 101422421 its reverse (124224101), we get a palindrome (225646522).

The spelling of 101422421 in words is "one hundred one million, four hundred twenty-two thousand, four hundred twenty-one".