102432221 has 4 divisors (see below), whose sum is σ = 102511200. Its totient is φ = 102353244.

The previous prime is 102432217. The next prime is 102432229. The reversal of 102432221 is 122234201.

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: 122234201 = 19 ⋅6433379.

It is a cyclic number.

It is not a de Polignac number, because 102432221 - 2² = 102432217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102432221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102432229) 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, 37511 + ... + 40148.

It is an arithmetic number, because the mean of its divisors is an integer number (25627800).

Almost surely, 2^102432221 is an apocalyptic number.

It is an amenable number.

102432221 is a deficient number, since it is larger than the sum of its proper divisors (78979).

102432221 is an equidigital number, since it uses as much as digits as its factorization.

102432221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78978.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 102432221 is about 10120.8804458901. The cubic root of 102432221 is about 467.8919031638.

Adding to 102432221 its reverse (122234201), we get a palindrome (224666422).

The spelling of 102432221 in words is "one hundred two million, four hundred thirty-two thousand, two hundred twenty-one".