1343212121205 has 12 divisors (see below), whose sum is σ = 2328234343500. Its totient is φ = 716379797952.

The previous prime is 1343212121171. The next prime is 1343212121261. The reversal of 1343212121205 is 5021212123431.

It is a happy number.

1343212121205 is a `hidden beast` number, since 1 + 3 + 4 + 321 + 212 + 120 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 596788695441 + 746423425764 = 772521^2 + 863958^2 .

It is not a de Polignac number, because 1343212121205 - 2¹⁵ = 1343212088437 is a prime.

It is a super-2 number, since 2×1343212121205² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14924579080 + ... + 14924579169.

It is an arithmetic number, because the mean of its divisors is an integer number (194019528625).

Almost surely, 2^{1343212121205} is an apocalyptic number.

1343212121205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1343212121205 is a deficient number, since it is larger than the sum of its proper divisors (985022222295).

1343212121205 is a wasteful number, since it uses less digits than its factorization.

1343212121205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29849158260 (or 29849158257 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

Adding to 1343212121205 its reverse (5021212123431), we get a palindrome (6364424244636).

The spelling of 1343212121205 in words is "one trillion, three hundred forty-three billion, two hundred twelve million, one hundred twenty-one thousand, two hundred five".