202102013 has 4 divisors (see below), whose sum is σ = 202499580. Its totient is φ = 201704448.

The previous prime is 202102003. The next prime is 202102039. The reversal of 202102013 is 310201202.

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 121066009 + 81036004 = 11003^2 + 9002^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202102013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202101985 and 202102003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202102003) 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, 198020 + ... + 199037.

It is an arithmetic number, because the mean of its divisors is an integer number (50624895).

Almost surely, 2^202102013 is an apocalyptic number.

It is an amenable number.

202102013 is a deficient number, since it is larger than the sum of its proper divisors (397567).

202102013 is an equidigital number, since it uses as much as digits as its factorization.

202102013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397566.

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

The square root of 202102013 is about 14216.2587553829. The cubic root of 202102013 is about 586.8451861090.

Adding to 202102013 its reverse (310201202), we get a palindrome (512303215).

The spelling of 202102013 in words is "two hundred two million, one hundred two thousand, thirteen".