202111312 has 40 divisors (see below), whose sum is σ = 422785440. Its totient is φ = 93045120.

The previous prime is 202111277. The next prime is 202111321. The reversal of 202111312 is 213111202.

It is a super-2 number, since 2×202111312² = 81697964876722688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 202111292 and 202111301.

It is a congruent number.

It is an unprimeable number.

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, 101139 + ... + 103117.

It is an arithmetic number, because the mean of its divisors is an integer number (10569636).

Almost surely, 2^202111312 is an apocalyptic number.

It is an amenable number.

202111312 is an abundant number, since it is smaller than the sum of its proper divisors (220674128).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

202111312 is a wasteful number, since it uses less digits than its factorization.

202111312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2491 (or 2485 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 202111312 is about 14216.5858067259. The cubic root of 202111312 is about 586.8541864972.

Adding to 202111312 its reverse (213111202), we get a palindrome (415222514).

The spelling of 202111312 in words is "two hundred two million, one hundred eleven thousand, three hundred twelve".