231121011 has 12 divisors (see below), whose sum is σ = 338723336. Its totient is φ = 140073120.

The previous prime is 231120983. The next prime is 231121013. The reversal of 231121011 is 110121132.

231121011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 231121011 - 2¹¹ = 231118963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231121013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 317986 + ... + 318711.

Almost surely, 2^231121011 is an apocalyptic number.

231121011 is a deficient number, since it is larger than the sum of its proper divisors (107602325).

231121011 is a wasteful number, since it uses less digits than its factorization.

231121011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636722 (or 636711 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 231121011 is about 15202.6646019703. The cubic root of 231121011 is about 613.6863678857.

Adding to 231121011 its reverse (110121132), we get a palindrome (341242143).

The spelling of 231121011 in words is "two hundred thirty-one million, one hundred twenty-one thousand, eleven".