212123430440042 has 8 divisors (see below), whose sum is σ = 347111067992832. Its totient is φ = 96419741109100.

The previous prime is 212123430440039. The next prime is 212123430440059. The reversal of 212123430440042 is 240044034321212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 212123430439990 and 212123430440008.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4820987055434 + ... + 4820987055477.

It is an arithmetic number, because the mean of its divisors is an integer number (43388883499104).

Almost surely, 2^{212123430440042} is an apocalyptic number.

212123430440042 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

212123430440042 is a deficient number, since it is larger than the sum of its proper divisors (134987637552790).

212123430440042 is a wasteful number, since it uses less digits than its factorization.

212123430440042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9641974110924.

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 212123430440042 its reverse (240044034321212), we get a palindrome (452167464761254).

The spelling of 212123430440042 in words is "two hundred twelve trillion, one hundred twenty-three billion, four hundred thirty million, four hundred forty thousand, forty-two".