1213412323421 has 2 divisors, whose sum is σ = 1213412323422. Its totient is φ = 1213412323420.

The previous prime is 1213412323399. The next prime is 1213412323507. The reversal of 1213412323421 is 1243232143121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1044659791396 + 168752532025 = 1022086^2 + 410795^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1213412323421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213412329421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606706161710 + 606706161711.

It is an arithmetic number, because the mean of its divisors is an integer number (606706161711).

Almost surely, 2^{1213412323421} is an apocalyptic number.

It is an amenable number.

1213412323421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213412323421 is an equidigital number, since it uses as much as digits as its factorization.

1213412323421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 29.

Adding to 1213412323421 its reverse (1243232143121), we get a palindrome (2456644466542).

The spelling of 1213412323421 in words is "one trillion, two hundred thirteen billion, four hundred twelve million, three hundred twenty-three thousand, four hundred twenty-one".