1213434511512 has 64 divisors (see below), whose sum is σ = 3040686000000. Its totient is φ = 403532093184.

The previous prime is 1213434511477. The next prime is 1213434511519. The reversal of 1213434511512 is 2151154343121.

It is a super-2 number, since 2×1213434511512² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213434511519) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39493468 + ... + 39524180.

It is an arithmetic number, because the mean of its divisors is an integer number (47510718750).

Almost surely, 2^{1213434511512} is an apocalyptic number.

1213434511512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1213434511512 is an abundant number, since it is smaller than the sum of its proper divisors (1827251488488).

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

1213434511512 is a wasteful number, since it uses less digits than its factorization.

1213434511512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34520 (or 34516 counting only the distinct ones).

The product of its digits is 14400, while the sum is 33.

Adding to 1213434511512 its reverse (2151154343121), we get a palindrome (3364588854633).

The spelling of 1213434511512 in words is "one trillion, two hundred thirteen billion, four hundred thirty-four million, five hundred eleven thousand, five hundred twelve".