102021221213 has 2 divisors, whose sum is σ = 102021221214. Its totient is φ = 102021221212.

The previous prime is 102021221171. The next prime is 102021221227. The reversal of 102021221213 is 312122120201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86410717849 + 15610503364 = 293957^2 + 124942^2 .

It is a cyclic number.

It is not a de Polignac number, because 102021221213 - 2¹⁸ = 102020959069 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102021221191 and 102021221200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102021226213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51010610606 + 51010610607.

It is an arithmetic number, because the mean of its divisors is an integer number (51010610607).

Almost surely, 2^102021221213 is an apocalyptic number.

It is an amenable number.

102021221213 is a deficient number, since it is larger than the sum of its proper divisors (1).

102021221213 is an equidigital number, since it uses as much as digits as its factorization.

102021221213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 102021221213 its reverse (312122120201), we get a palindrome (414143341414).

The spelling of 102021221213 in words is "one hundred two billion, twenty-one million, two hundred twenty-one thousand, two hundred thirteen".