2012011231 has 4 divisors (see below), whose sum is σ = 2020027464. Its totient is φ = 2003995000.

The previous prime is 2012011207. The next prime is 2012011249. The reversal of 2012011231 is 1321102102.

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 2012011231 - 2¹⁹ = 2011486943 is a prime.

It is a super-2 number, since 2×2012011231² = 8096378387340270722, 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 (2012011291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4007740 + ... + 4008241.

It is an arithmetic number, because the mean of its divisors is an integer number (505006866).

Almost surely, 2^2012011231 is an apocalyptic number.

2012011231 is a deficient number, since it is larger than the sum of its proper divisors (8016233).

2012011231 is an equidigital number, since it uses as much as digits as its factorization.

2012011231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8016232.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 2012011231 is about 44855.4481752217. The cubic root of 2012011231 is about 1262.4382180138.

Adding to 2012011231 its reverse (1321102102), we get a palindrome (3333113333).

The spelling of 2012011231 in words is "two billion, twelve million, eleven thousand, two hundred thirty-one".