102020213 has 4 divisors (see below), whose sum is σ = 108021420. Its totient is φ = 96019008.

The previous prime is 102020189. The next prime is 102020227. The reversal of 102020213 is 312020201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 33097009 + 68923204 = 5753^2 + 8302^2 .

It is a cyclic number.

It is not a de Polignac number, because 102020213 - 2¹⁴ = 102003829 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 102020194 and 102020203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102020273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3000578 + ... + 3000611.

It is an arithmetic number, because the mean of its divisors is an integer number (27005355).

Almost surely, 2^102020213 is an apocalyptic number.

It is an amenable number.

102020213 is a deficient number, since it is larger than the sum of its proper divisors (6001207).

102020213 is an equidigital number, since it uses as much as digits as its factorization.

102020213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6001206.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 102020213 is about 10100.5055814053. The cubic root of 102020213 is about 467.2637341240.

Adding to 102020213 its reverse (312020201), we get a palindrome (414040414).

The spelling of 102020213 in words is "one hundred two million, twenty thousand, two hundred thirteen".