1231430354111 has 16 divisors (see below), whose sum is σ = 1275031348800. Its totient is φ = 1187905824000.

The previous prime is 1231430354087. The next prime is 1231430354123. The reversal of 1231430354111 is 1114530341321.

It is a cyclic number.

It is not a de Polignac number, because 1231430354111 - 2⁶ = 1231430354047 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231430314111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 291047366 + ... + 291051596.

It is an arithmetic number, because the mean of its divisors is an integer number (79689459300).

Almost surely, 2^{1231430354111} is an apocalyptic number.

1231430354111 is a deficient number, since it is larger than the sum of its proper divisors (43600994689).

1231430354111 is a wasteful number, since it uses less digits than its factorization.

1231430354111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10850.

The product of its (nonzero) digits is 4320, while the sum is 29.

Adding to 1231430354111 its reverse (1114530341321), we get a palindrome (2345960695432).

The spelling of 1231430354111 in words is "one trillion, two hundred thirty-one billion, four hundred thirty million, three hundred fifty-four thousand, one hundred eleven".