212212142 has 4 divisors (see below), whose sum is σ = 318318216. Its totient is φ = 106106070.

The previous prime is 212212141. The next prime is 212212151. The reversal of 212212142 is 241212212.

212212142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 212212142.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212212141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53053034 + ... + 53053037.

It is an arithmetic number, because the mean of its divisors is an integer number (79579554).

Almost surely, 2^212212142 is an apocalyptic number.

212212142 is a deficient number, since it is larger than the sum of its proper divisors (106106074).

212212142 is a wasteful number, since it uses less digits than its factorization.

212212142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106106073.

The product of its digits is 128, while the sum is 17.

The square root of 212212142 is about 14567.5029431952. The cubic root of 212212142 is about 596.4720203320.

Adding to 212212142 its reverse (241212212), we get a palindrome (453424354).

The spelling of 212212142 in words is "two hundred twelve million, two hundred twelve thousand, one hundred forty-two".