2011012331 has 4 divisors (see below), whose sum is σ = 2129307192. Its totient is φ = 1892717472.

The previous prime is 2011012327. The next prime is 2011012349. The reversal of 2011012331 is 1332101102.

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 2011012331 - 2² = 2011012327 is a prime.

It is a super-2 number, since 2×2011012331² = 8088341190868107122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2011012301) 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, 59147405 + ... + 59147438.

It is an arithmetic number, because the mean of its divisors is an integer number (532326798).

Almost surely, 2^2011012331 is an apocalyptic number.

2011012331 is a deficient number, since it is larger than the sum of its proper divisors (118294861).

2011012331 is a wasteful number, since it uses less digits than its factorization.

2011012331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118294860.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 2011012331 is about 44844.3121365464. The cubic root of 2011012331 is about 1262.2292632021.

Adding to 2011012331 its reverse (1332101102), we get a palindrome (3343113433).

The spelling of 2011012331 in words is "two billion, eleven million, twelve thousand, three hundred thirty-one".