202111345 has 16 divisors (see below), whose sum is σ = 248951808. Its totient is φ = 157426560.

The previous prime is 202111321. The next prime is 202111363. The reversal of 202111345 is 543111202.

It is not a de Polignac number, because 202111345 - 2⁹ = 202110833 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 185392 + ... + 186478.

It is an arithmetic number, because the mean of its divisors is an integer number (15559488).

Almost surely, 2^202111345 is an apocalyptic number.

It is an amenable number.

202111345 is a deficient number, since it is larger than the sum of its proper divisors (46840463).

202111345 is a wasteful number, since it uses less digits than its factorization.

202111345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2040.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 202111345 is about 14216.5869673421. The cubic root of 202111345 is about 586.8542184370.

Adding to 202111345 its reverse (543111202), we get a palindrome (745222547).

It can be divided in two parts, 2021 and 11345, that added together give a triangular number (13366 = T₁₆₃).

The spelling of 202111345 in words is "two hundred two million, one hundred eleven thousand, three hundred forty-five".