103201421 has 4 divisors (see below), whose sum is σ = 103531452. Its totient is φ = 102871392.

The previous prime is 103201409. The next prime is 103201429. The reversal of 103201421 is 124102301.

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 29052100 + 74149321 = 5390^2 + 8611^2 .

It is a cyclic number.

It is not a de Polignac number, because 103201421 - 2²⁶ = 36092557 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 103201396 and 103201405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103201429) 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, 164546 + ... + 165171.

It is an arithmetic number, because the mean of its divisors is an integer number (25882863).

Almost surely, 2^103201421 is an apocalyptic number.

It is an amenable number.

103201421 is a deficient number, since it is larger than the sum of its proper divisors (330031).

103201421 is an equidigital number, since it uses as much as digits as its factorization.

103201421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330030.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 103201421 is about 10158.8100188949. The cubic root of 103201421 is about 469.0601726448.

Adding to 103201421 its reverse (124102301), we get a palindrome (227303722).

The spelling of 103201421 in words is "one hundred three million, two hundred one thousand, four hundred twenty-one".