1213034343421 has 16 divisors (see below), whose sum is σ = 1276726284288. Its totient is φ = 1150269120000.

The previous prime is 1213034343397. The next prime is 1213034343457. The reversal of 1213034343421 is 1243434303121.

It is a cyclic number.

It is not a de Polignac number, because 1213034343421 - 2¹³ = 1213034335229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213034343481) 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, 3640621 + ... + 3959821.

It is an arithmetic number, because the mean of its divisors is an integer number (79795392768).

Almost surely, 2^{1213034343421} is an apocalyptic number.

It is an amenable number.

1213034343421 is a deficient number, since it is larger than the sum of its proper divisors (63691940867).

1213034343421 is a wasteful number, since it uses less digits than its factorization.

1213034343421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320652.

The product of its (nonzero) digits is 20736, while the sum is 31.

Adding to 1213034343421 its reverse (1243434303121), we get a palindrome (2456468646542).

The spelling of 1213034343421 in words is "one trillion, two hundred thirteen billion, thirty-four million, three hundred forty-three thousand, four hundred twenty-one".