1231240011 has 32 divisors (see below), whose sum is σ = 1769983488. Its totient is φ = 758545920.

The previous prime is 1231239983. The next prime is 1231240013. The reversal of 1231240011 is 1100421321.

1231240011 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1231240011 - 2⁷ = 1231239883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1231240013) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 765370 + ... + 766976.

It is an arithmetic number, because the mean of its divisors is an integer number (55311984).

Almost surely, 2^1231240011 is an apocalyptic number.

1231240011 is a deficient number, since it is larger than the sum of its proper divisors (538743477).

1231240011 is a wasteful number, since it uses less digits than its factorization.

1231240011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1891.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 1231240011 is about 35089.0297814003. The cubic root of 1231240011 is about 1071.8012026825.

Adding to 1231240011 its reverse (1100421321), we get a palindrome (2331661332).

The spelling of 1231240011 in words is "one billion, two hundred thirty-one million, two hundred forty thousand, eleven".