43401231221311 has 2 divisors, whose sum is σ = 43401231221312. Its totient is φ = 43401231221310.

The previous prime is 43401231221269. The next prime is 43401231221357. The reversal of 43401231221311 is 11312213210434.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43401231221311 - 2²⁹ = 43400694350399 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43401231221311.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43401231221011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21700615610655 + 21700615610656.

It is an arithmetic number, because the mean of its divisors is an integer number (21700615610656).

Almost surely, 2^{43401231221311} is an apocalyptic number.

43401231221311 is a deficient number, since it is larger than the sum of its proper divisors (1).

43401231221311 is an equidigital number, since it uses as much as digits as its factorization.

43401231221311 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

Adding to 43401231221311 its reverse (11312213210434), we get a palindrome (54713444431745).

The spelling of 43401231221311 in words is "forty-three trillion, four hundred one billion, two hundred thirty-one million, two hundred twenty-one thousand, three hundred eleven".