202123112 has 16 divisors (see below), whose sum is σ = 388224900. Its totient is φ = 98596480.

The previous prime is 202123111. The next prime is 202123139. The reversal of 202123112 is 211321202.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 199769956 + 2353156 = 14134^2 + 1534^2 .

It is not an unprimeable number, because it can be changed into a prime (202123111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 307787 + ... + 308442.

Almost surely, 2^202123112 is an apocalyptic number.

It is an amenable number.

202123112 is a deficient number, since it is larger than the sum of its proper divisors (186101788).

202123112 is a wasteful number, since it uses less digits than its factorization.

202123112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616276 (or 616272 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 202123112 is about 14217.0008088907. Note that the first 3 decimals coincide. The cubic root of 202123112 is about 586.8656071752.

Adding to 202123112 its reverse (211321202), we get a palindrome (413444314).

The spelling of 202123112 in words is "two hundred two million, one hundred twenty-three thousand, one hundred twelve".