212340142124 has 72 divisors (see below), whose sum is σ = 420104538000. Its totient is φ = 93130646400.

The previous prime is 212340142123. The next prime is 212340142169. The reversal of 212340142124 is 421241043212.

It is a junction number, because it is equal to n+sod(n) for n = 212340142093 and 212340142102.

It is not an unprimeable number, because it can be changed into a prime (212340142123) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 14749922 + ... + 14764310.

It is an arithmetic number, because the mean of its divisors is an integer number (5834785250).

Almost surely, 2^212340142124 is an apocalyptic number.

It is an amenable number.

212340142124 is a deficient number, since it is larger than the sum of its proper divisors (207764395876).

212340142124 is a wasteful number, since it uses less digits than its factorization.

212340142124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14815 (or 14782 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 212340142124 its reverse (421241043212), we get a palindrome (633581185336).

The spelling of 212340142124 in words is "two hundred twelve billion, three hundred forty million, one hundred forty-two thousand, one hundred twenty-four".