212112045 has 24 divisors (see below), whose sum is σ = 368675736. Its totient is φ = 112814208.

The previous prime is 212112023. The next prime is 212112059. The reversal of 212112045 is 540211212.

It can be written as a sum of positive squares in 4 ways, for example, as 2499561 + 209612484 = 1581^2 + 14478^2 .

It is not a de Polignac number, because 212112045 - 2⁶ = 212111981 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 10467 + ... + 23103.

It is an arithmetic number, because the mean of its divisors is an integer number (15361489).

Almost surely, 2^212112045 is an apocalyptic number.

It is an amenable number.

212112045 is a deficient number, since it is larger than the sum of its proper divisors (156563691).

212112045 is a wasteful number, since it uses less digits than its factorization.

212112045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13021 (or 13018 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 212112045 is about 14564.0669114091. The cubic root of 212112045 is about 596.3782235476.

Adding to 212112045 its reverse (540211212), we get a palindrome (752323257).

The spelling of 212112045 in words is "two hundred twelve million, one hundred twelve thousand, forty-five".