103201021 has 12 divisors (see below), whose sum is σ = 129642016. Its totient is φ = 80415720.

The previous prime is 103201009. The next prime is 103201031. The reversal of 103201021 is 120102301.

It is not a de Polignac number, because 103201021 - 2¹¹ = 103198973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 103200989 and 103201007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103201001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60075 + ... + 61768.

Almost surely, 2^103201021 is an apocalyptic number.

103201021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

103201021 is a deficient number, since it is larger than the sum of its proper divisors (26440995).

103201021 is a wasteful number, since it uses less digits than its factorization.

103201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121872 (or 121861 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 103201021 is about 10158.7903315306. The cubic root of 103201021 is about 469.0595666315.

Adding to 103201021 its reverse (120102301), we get a palindrome (223303322).

The spelling of 103201021 in words is "one hundred three million, two hundred one thousand, twenty-one".