1213343412 has 24 divisors (see below), whose sum is σ = 2928760800. Its totient is φ = 390501216.

The previous prime is 1213343407. The next prime is 1213343429. The reversal of 1213343412 is 2143433121.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1742962 + ... + 1743657.

It is an arithmetic number, because the mean of its divisors is an integer number (122031700).

Almost surely, 2^1213343412 is an apocalyptic number.

1213343412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1213343412 is an abundant number, since it is smaller than the sum of its proper divisors (1715417388).

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

1213343412 is a wasteful number, since it uses less digits than its factorization.

1213343412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3486655 (or 3486653 counting only the distinct ones).

The product of its digits is 1728, while the sum is 24.

The square root of 1213343412 is about 34833.0792781804. The cubic root of 1213343412 is about 1066.5828072528.

Adding to 1213343412 its reverse (2143433121), we get a palindrome (3356776533).

The spelling of 1213343412 in words is "one billion, two hundred thirteen million, three hundred forty-three thousand, four hundred twelve".