231301232011 has 4 divisors (see below), whose sum is σ = 231506105800. Its totient is φ = 231096358224.

The previous prime is 231301232009. The next prime is 231301232021. The reversal of 231301232011 is 110232103132.

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 231301232011 - 2¹ = 231301232009 is a prime.

It is a super-2 number, since 2×231301232011² (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 231301232011.

It is not an unprimeable number, because it can be changed into a prime (231301232021) 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, 102435201 + ... + 102437458.

It is an arithmetic number, because the mean of its divisors is an integer number (57876526450).

Almost surely, 2^231301232011 is an apocalyptic number.

231301232011 is a deficient number, since it is larger than the sum of its proper divisors (204873789).

231301232011 is a wasteful number, since it uses less digits than its factorization.

231301232011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204873788.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 231301232011 its reverse (110232103132), we get a palindrome (341533335143).

The spelling of 231301232011 in words is "two hundred thirty-one billion, three hundred one million, two hundred thirty-two thousand, eleven".