212102142 has 16 divisors (see below), whose sum is σ = 484804992. Its totient is φ = 60600600.

The previous prime is 212102089. The next prime is 212102153. The reversal of 212102142 is 241201212.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 2524984 + ... + 2525067.

It is an arithmetic number, because the mean of its divisors is an integer number (30300312).

Almost surely, 2^212102142 is an apocalyptic number.

212102142 is an abundant number, since it is smaller than the sum of its proper divisors (272702850).

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

212102142 is a wasteful number, since it uses less digits than its factorization.

212102142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5050063.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 212102142 is about 14563.7269268550. The cubic root of 212102142 is about 596.3689422493.

Adding to 212102142 its reverse (241201212), we get a palindrome (453303354).

The spelling of 212102142 in words is "two hundred twelve million, one hundred two thousand, one hundred forty-two".