231121232011 has 8 divisors (see below), whose sum is σ = 243381377600. Its totient is φ = 218870673480.

The previous prime is 231121231997. The next prime is 231121232029. The reversal of 231121232011 is 110232121132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231121232011 - 2¹⁹ = 231120707723 is a prime.

It is a super-2 number, since 2×231121232011² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

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 231121232011.

It is not an unprimeable number, because it can be changed into a prime (231121233011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2347245 + ... + 2443726.

It is an arithmetic number, because the mean of its divisors is an integer number (30422672200).

Almost surely, 2^231121232011 is an apocalyptic number.

231121232011 is a deficient number, since it is larger than the sum of its proper divisors (12260145589).

231121232011 is a wasteful number, since it uses less digits than its factorization.

231121232011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4793529.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 231121232011 its reverse (110232121132), we get a palindrome (341353353143).

The spelling of 231121232011 in words is "two hundred thirty-one billion, one hundred twenty-one million, two hundred thirty-two thousand, eleven".