102023321221 has 4 divisors (see below), whose sum is σ = 102052734700. Its totient is φ = 101993907744.

The previous prime is 102023321201. The next prime is 102023321233. The reversal of 102023321221 is 122123320201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122123320201 = 191 ⋅639389111.

It can be written as a sum of positive squares in 2 ways, for example, as 20310240196 + 81713081025 = 142514^2 + 285855^2 .

It is a cyclic number.

It is not a de Polignac number, because 102023321221 - 2⁵ = 102023321189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102023321201) 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, 14701536 + ... + 14708473.

It is an arithmetic number, because the mean of its divisors is an integer number (25513183675).

Almost surely, 2^102023321221 is an apocalyptic number.

It is an amenable number.

102023321221 is a deficient number, since it is larger than the sum of its proper divisors (29413479).

102023321221 is an equidigital number, since it uses as much as digits as its factorization.

102023321221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29413478.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 102023321221 its reverse (122123320201), we get a palindrome (224146641422).

The spelling of 102023321221 in words is "one hundred two billion, twenty-three million, three hundred twenty-one thousand, two hundred twenty-one".