101122421 has 4 divisors (see below), whose sum is σ = 105519072. Its totient is φ = 96725772.

The previous prime is 101122397. The next prime is 101122459. The reversal of 101122421 is 124221101.

It is a happy number.

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: 124221101 = 79 ⋅1572419.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101122421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101122396 and 101122405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101122471) 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 in 3 ways as a sum of consecutive naturals, for example, 2198291 + ... + 2198336.

It is an arithmetic number, because the mean of its divisors is an integer number (26379768).

Almost surely, 2^101122421 is an apocalyptic number.

It is an amenable number.

101122421 is a deficient number, since it is larger than the sum of its proper divisors (4396651).

101122421 is an equidigital number, since it uses as much as digits as its factorization.

101122421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4396650.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 101122421 is about 10055.9644490223. The cubic root of 101122421 is about 465.8890318273.

Adding to 101122421 its reverse (124221101), we get a palindrome (225343522).

It can be divided in two parts, 1011 and 22421, that added together give a palindrome (23432).

The spelling of 101122421 in words is "one hundred one million, one hundred twenty-two thousand, four hundred twenty-one".