100101421 has 4 divisors (see below), whose sum is σ = 114401632. Its totient is φ = 85801212.

The previous prime is 100101401. The next prime is 100101431. The reversal of 100101421 is 124101001.

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.

It is a de Polignac number, because none of the positive numbers 2^k-100101421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100101398 and 100101407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100101401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7150095 + ... + 7150108.

It is an arithmetic number, because the mean of its divisors is an integer number (28600408).

Almost surely, 2^100101421 is an apocalyptic number.

It is an amenable number.

100101421 is a deficient number, since it is larger than the sum of its proper divisors (14300211).

100101421 is an equidigital number, since it uses as much as digits as its factorization.

100101421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14300210.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 100101421 is about 10005.0697648742. The cubic root of 100101421 is about 464.3157485355.

Adding to 100101421 its reverse (124101001), we get a palindrome (224202422).

The spelling of 100101421 in words is "one hundred million, one hundred one thousand, four hundred twenty-one".