102340223021 has 2 divisors, whose sum is σ = 102340223022. Its totient is φ = 102340223020.

The previous prime is 102340222997. The next prime is 102340223071. The reversal of 102340223021 is 120322043201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88348645225 + 13991577796 = 297235^2 + 118286^2 .

It is a cyclic number.

It is not a de Polignac number, because 102340223021 - 2²⁶ = 102273114157 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102340222984 and 102340223002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102340223071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51170111510 + 51170111511.

It is an arithmetic number, because the mean of its divisors is an integer number (51170111511).

Almost surely, 2^102340223021 is an apocalyptic number.

It is an amenable number.

102340223021 is a deficient number, since it is larger than the sum of its proper divisors (1).

102340223021 is an equidigital number, since it uses as much as digits as its factorization.

102340223021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 102340223021 its reverse (120322043201), we get a palindrome (222662266222).

The spelling of 102340223021 in words is "one hundred two billion, three hundred forty million, two hundred twenty-three thousand, twenty-one".