102201321 has 4 divisors (see below), whose sum is σ = 136268432. Its totient is φ = 68134212.

The previous prime is 102201317. The next prime is 102201373. The reversal of 102201321 is 123102201.

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 not a de Polignac number, because 102201321 - 2² = 102201317 is a prime.

It is a super-2 number, since 2×102201321² = 20890220028290082, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102201297 and 102201306.

It is not an unprimeable number, because it can be changed into a prime (102201301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17033551 + ... + 17033556.

It is an arithmetic number, because the mean of its divisors is an integer number (34067108).

Almost surely, 2^102201321 is an apocalyptic number.

It is an amenable number.

102201321 is a deficient number, since it is larger than the sum of its proper divisors (34067111).

102201321 is an equidigital number, since it uses as much as digits as its factorization.

102201321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34067110.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 102201321 is about 10109.4668998914. The cubic root of 102201321 is about 467.5400688201.

Adding to 102201321 its reverse (123102201), we get a palindrome (225303522).

The spelling of 102201321 in words is "one hundred two million, two hundred one thousand, three hundred twenty-one".