102200021321 has 2 divisors, whose sum is σ = 102200021322. Its totient is φ = 102200021320.

The previous prime is 102200021281. The next prime is 102200021359. The reversal of 102200021321 is 123120002201.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57936490000 + 44263531321 = 240700^2 + 210389^2 .

It is a cyclic number.

It is not a de Polignac number, because 102200021321 - 2²⁶ = 102132912457 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102200021296 and 102200021305.

It is not a weakly prime, because it can be changed into another prime (102200021381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51100010660 + 51100010661.

It is an arithmetic number, because the mean of its divisors is an integer number (51100010661).

Almost surely, 2^102200021321 is an apocalyptic number.

It is an amenable number.

102200021321 is a deficient number, since it is larger than the sum of its proper divisors (1).

102200021321 is an equidigital number, since it uses as much as digits as its factorization.

102200021321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 102200021321 its reverse (123120002201), we get a palindrome (225320023522).

The spelling of 102200021321 in words is "one hundred two billion, two hundred million, twenty-one thousand, three hundred twenty-one".