202111013 has 8 divisors (see below), whose sum is σ = 217894488. Its totient is φ = 186361344.

The previous prime is 202111001. The next prime is 202111073. The reversal of 202111013 is 310111202.

It can be written as a sum of positive squares in 4 ways, for example, as 70274689 + 131836324 = 8383^2 + 11482^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 202111013 - 2¹⁶ = 202045477 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202110985 and 202111003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202111073) 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 7 ways as a sum of consecutive naturals, for example, 4745 + ... + 20657.

It is an arithmetic number, because the mean of its divisors is an integer number (27236811).

Almost surely, 2^202111013 is an apocalyptic number.

It is an amenable number.

202111013 is a deficient number, since it is larger than the sum of its proper divisors (15783475).

202111013 is a wasteful number, since it uses less digits than its factorization.

202111013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16903.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 202111013 is about 14216.5752908357. The cubic root of 202111013 is about 586.8538971031.

Adding to 202111013 its reverse (310111202), we get a palindrome (512222215).

The spelling of 202111013 in words is "two hundred two million, one hundred eleven thousand, thirteen".