1221312113434 has 32 divisors (see below), whose sum is σ = 2099141625600. Its totient is φ = 522055290240.

The previous prime is 1221312113401. The next prime is 1221312113447. The reversal of 1221312113434 is 4343112131221.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8432622 + ... + 8576230.

It is an arithmetic number, because the mean of its divisors is an integer number (65598175800).

Almost surely, 2^{1221312113434} is an apocalyptic number.

1221312113434 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1221312113434 is a deficient number, since it is larger than the sum of its proper divisors (877829512166).

1221312113434 is a wasteful number, since it uses less digits than its factorization.

1221312113434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145198.

The product of its digits is 3456, while the sum is 28.

Adding to 1221312113434 its reverse (4343112131221), we get a palindrome (5564424244655).

The spelling of 1221312113434 in words is "one trillion, two hundred twenty-one billion, three hundred twelve million, one hundred thirteen thousand, four hundred thirty-four".