1212420240234 has 40 divisors (see below), whose sum is σ = 3104822205408. Its totient is φ = 346405782600.

The previous prime is 1212420240221. The next prime is 1212420240257. The reversal of 1212420240234 is 4320420242121.

It is a happy number.

1212420240234 is a `hidden beast` number, since 1 + 2 + 1 + 2 + 420 + 2 + 4 + 0 + 234 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1212420240198 and 1212420240207.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 534575692 + ... + 534577959.

Almost surely, 2^{1212420240234} is an apocalyptic number.

1212420240234 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1212420240234 is an abundant number, since it is smaller than the sum of its proper divisors (1892401965174).

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

1212420240234 is a wasteful number, since it uses less digits than its factorization.

1212420240234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1069153672 (or 1069153663 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 1212420240234 its reverse (4320420242121), we get a palindrome (5532840482355).

The spelling of 1212420240234 in words is "one trillion, two hundred twelve billion, four hundred twenty million, two hundred forty thousand, two hundred thirty-four".