102100201321 has 4 divisors (see below), whose sum is σ = 102101010832. Its totient is φ = 102099391812.

The previous prime is 102100201283. The next prime is 102100201327. The reversal of 102100201321 is 123102001201.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 123102001201 = 75709 ⋅1625989.

It is a cyclic number.

It is not a de Polignac number, because 102100201321 - 2⁷ = 102100201193 is a prime.

It is a super-2 number, since 2×102100201321² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102100201327) 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, 170295 + ... + 482908.

It is an arithmetic number, because the mean of its divisors is an integer number (25525252708).

Almost surely, 2^102100201321 is an apocalyptic number.

It is an amenable number.

102100201321 is a deficient number, since it is larger than the sum of its proper divisors (809511).

102100201321 is an equidigital number, since it uses as much as digits as its factorization.

102100201321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809510.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 102100201321 its reverse (123102001201), we get a palindrome (225202202522).

The spelling of 102100201321 in words is "one hundred two billion, one hundred million, two hundred one thousand, three hundred twenty-one".