2011001231 has 4 divisors (see below), whose sum is σ = 2039325264. Its totient is φ = 1982677200.

The previous prime is 2011001227. The next prime is 2011001257. The reversal of 2011001231 is 1321001102.

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 2011001231 - 2² = 2011001227 is a prime.

It is a super-2 number, since 2×2011001231² = 8088251902167030722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011001261) 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, 14161910 + ... + 14162051.

It is an arithmetic number, because the mean of its divisors is an integer number (509831316).

Almost surely, 2^2011001231 is an apocalyptic number.

2011001231 is a deficient number, since it is larger than the sum of its proper divisors (28324033).

2011001231 is an equidigital number, since it uses as much as digits as its factorization.

2011001231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28324032.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 2011001231 is about 44844.1883748608. The cubic root of 2011001231 is about 1262.2269408608.

Adding to 2011001231 its reverse (1321001102), we get a palindrome (3332002333).

The spelling of 2011001231 in words is "two billion, eleven million, one thousand, two hundred thirty-one".