231420121433 has 2 divisors, whose sum is σ = 231420121434. Its totient is φ = 231420121432.

The previous prime is 231420121403. The next prime is 231420121451. The reversal of 231420121433 is 334121024132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 198562033609 + 32858087824 = 445603^2 + 181268^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231420121433 is a prime.

It is not a weakly prime, because it can be changed into another prime (231420121403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115710060716 + 115710060717.

It is an arithmetic number, because the mean of its divisors is an integer number (115710060717).

Almost surely, 2^231420121433 is an apocalyptic number.

It is an amenable number.

231420121433 is a deficient number, since it is larger than the sum of its proper divisors (1).

231420121433 is an equidigital number, since it uses as much as digits as its factorization.

231420121433 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 231420121433 its reverse (334121024132), we get a palindrome (565541145565).

The spelling of 231420121433 in words is "two hundred thirty-one billion, four hundred twenty million, one hundred twenty-one thousand, four hundred thirty-three".