101443421 has 4 divisors (see below), whose sum is σ = 104941500. Its totient is φ = 97945344.

The previous prime is 101443411. The next prime is 101443423. The reversal of 101443421 is 124344101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 36060025 + 65383396 = 6005^2 + 8086^2 .

It is a cyclic number.

It is not a de Polignac number, because 101443421 - 2¹⁸ = 101181277 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 101443393 and 101443402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101443423) 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, 1748996 + ... + 1749053.

It is an arithmetic number, because the mean of its divisors is an integer number (26235375).

Almost surely, 2^101443421 is an apocalyptic number.

It is an amenable number.

101443421 is a deficient number, since it is larger than the sum of its proper divisors (3498079).

101443421 is an equidigital number, since it uses as much as digits as its factorization.

101443421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3498078.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 101443421 is about 10071.9124797627. The cubic root of 101443421 is about 466.3814792109.

Adding to 101443421 its reverse (124344101), we get a palindrome (225787522).

The spelling of 101443421 in words is "one hundred one million, four hundred forty-three thousand, four hundred twenty-one".