212101142 has 48 divisors (see below), whose sum is σ = 371676480. Its totient is φ = 90454320.

The previous prime is 212101139. The next prime is 212101171. The reversal of 212101142 is 241101212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 749333 + ... + 749615.

It is an arithmetic number, because the mean of its divisors is an integer number (7743260).

Almost surely, 2^212101142 is an apocalyptic number.

212101142 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

212101142 is a deficient number, since it is larger than the sum of its proper divisors (159575338).

212101142 is a wasteful number, since it uses less digits than its factorization.

212101142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489 (or 478 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 212101142 is about 14563.6925949431. The cubic root of 212101142 is about 596.3680050124.

Adding to 212101142 its reverse (241101212), we get a palindrome (453202354).

The spelling of 212101142 in words is "two hundred twelve million, one hundred one thousand, one hundred forty-two".