1212420443234 has 64 divisors (see below), whose sum is σ = 2585433053952. Its totient is φ = 410386176000.

The previous prime is 1212420443233. The next prime is 1212420443281. The reversal of 1212420443234 is 4323440242121.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1212420443234.

It is not an unprimeable number, because it can be changed into a prime (1212420443233) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 17777867 + ... + 17845934.

It is an arithmetic number, because the mean of its divisors is an integer number (40397391468).

Almost surely, 2^{1212420443234} is an apocalyptic number.

1212420443234 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1212420443234 is an abundant number, since it is smaller than the sum of its proper divisors (1373012610718).

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

1212420443234 is a wasteful number, since it uses less digits than its factorization.

1212420443234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35623851.

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

Adding to 1212420443234 its reverse (4323440242121), we get a palindrome (5535860685355).

The spelling of 1212420443234 in words is "one trillion, two hundred twelve billion, four hundred twenty million, four hundred forty-three thousand, two hundred thirty-four".