212012112042 has 40 divisors (see below), whose sum is σ = 475096971492. Its totient is φ = 70665825600.

The previous prime is 212012112031. The next prime is 212012112077. The reversal of 212012112042 is 240211210212.

It can be written as a sum of positive squares in 2 ways, for example, as 201133413441 + 10878698601 = 448479^2 + 104301^2 .

It is a super-2 number, since 2×212012112042² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2899492 + ... + 2971712.

Almost surely, 2^212012112042 is an apocalyptic number.

212012112042 is an abundant number, since it is smaller than the sum of its proper divisors (263084859450).

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

212012112042 is a wasteful number, since it uses less digits than its factorization.

212012112042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90356 (or 90347 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 212012112042 its reverse (240211210212), we get a palindrome (452223322254).

The spelling of 212012112042 in words is "two hundred twelve billion, twelve million, one hundred twelve thousand, forty-two".