1431020323111 has 4 divisors (see below), whose sum is σ = 1431174587032. Its totient is φ = 1430866059192.

The previous prime is 1431020323097. The next prime is 1431020323163. The reversal of 1431020323111 is 1113230201341.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1431020323111 - 2⁵ = 1431020323079 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 (1431020333111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77118045 + ... + 77136598.

It is an arithmetic number, because the mean of its divisors is an integer number (357793646758).

Almost surely, 2^{1431020323111} is an apocalyptic number.

1431020323111 is a deficient number, since it is larger than the sum of its proper divisors (154263921).

1431020323111 is an equidigital number, since it uses as much as digits as its factorization.

1431020323111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154263920.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 1431020323111 its reverse (1113230201341), we get a palindrome (2544250524452).

The spelling of 1431020323111 in words is "one trillion, four hundred thirty-one billion, twenty million, three hundred twenty-three thousand, one hundred eleven".