231142004011 has 4 divisors (see below), whose sum is σ = 235503173952. Its totient is φ = 226780834072.

The previous prime is 231142004003. The next prime is 231142004033. The reversal of 231142004011 is 110400241132.

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 231142004011 - 2³ = 231142004003 is a prime.

It is a super-2 number, since 2×231142004011² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231142004011.

It is not an unprimeable number, because it can be changed into a prime (231142004911) 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, 2180584891 + ... + 2180584996.

It is an arithmetic number, because the mean of its divisors is an integer number (58875793488).

Almost surely, 2^231142004011 is an apocalyptic number.

231142004011 is a deficient number, since it is larger than the sum of its proper divisors (4361169941).

231142004011 is an equidigital number, since it uses as much as digits as its factorization.

231142004011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4361169940.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 231142004011 its reverse (110400241132), we get a palindrome (341542245143).

The spelling of 231142004011 in words is "two hundred thirty-one billion, one hundred forty-two million, four thousand, eleven".