1233311113421 has 2 divisors, whose sum is σ = 1233311113422. Its totient is φ = 1233311113420.

The previous prime is 1233311113381. The next prime is 1233311113457. The reversal of 1233311113421 is 1243111133321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 704825732521 + 528485380900 = 839539^2 + 726970^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1233311113421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1233311713421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 616655556710 + 616655556711.

It is an arithmetic number, because the mean of its divisors is an integer number (616655556711).

Almost surely, 2^{1233311113421} is an apocalyptic number.

It is an amenable number.

1233311113421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1233311113421 is an equidigital number, since it uses as much as digits as its factorization.

1233311113421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 26.

Adding to 1233311113421 its reverse (1243111133321), we get a palindrome (2476422246742).

The spelling of 1233311113421 in words is "one trillion, two hundred thirty-three billion, three hundred eleven million, one hundred thirteen thousand, four hundred twenty-one".