1235231131111 has 4 divisors (see below), whose sum is σ = 1239254685592. Its totient is φ = 1231207576632.

The previous prime is 1235231131103. The next prime is 1235231131159. The reversal of 1235231131111 is 1111311325321.

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 1235231131111 - 2³ = 1235231131103 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 (1235231132111) 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, 2011776780 + ... + 2011777393.

It is an arithmetic number, because the mean of its divisors is an integer number (309813671398).

Almost surely, 2^{1235231131111} is an apocalyptic number.

1235231131111 is a deficient number, since it is larger than the sum of its proper divisors (4023554481).

1235231131111 is an equidigital number, since it uses as much as digits as its factorization.

1235231131111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4023554480.

The product of its digits is 540, while the sum is 25.

Adding to 1235231131111 its reverse (1111311325321), we get a palindrome (2346542456432).

The spelling of 1235231131111 in words is "one trillion, two hundred thirty-five billion, two hundred thirty-one million, one hundred thirty-one thousand, one hundred eleven".