1231002012 has 12 divisors (see below), whose sum is σ = 2872338056. Its totient is φ = 410334000.

The previous prime is 1231002007. The next prime is 1231002013. The reversal of 1231002012 is 2102001321.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Harshad number since it is a multiple of its sum of digits (12), and also a Moran number because the ratio is a prime number: 102583501 = 1231002012 / (1 + 2 + 3 + 1 + 0 + 0 + 2 + 0 + 1 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231002013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51291739 + ... + 51291762.

Almost surely, 2^1231002012 is an apocalyptic number.

1231002012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1231002012 is an abundant number, since it is smaller than the sum of its proper divisors (1641336044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1231002012 is a wasteful number, since it uses less digits than its factorization.

1231002012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102583508 (or 102583506 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1231002012 is about 35085.6382584100. The cubic root of 1231002012 is about 1071.7321384193.

Adding to 1231002012 its reverse (2102001321), we get a palindrome (3333003333).

The spelling of 1231002012 in words is "one billion, two hundred thirty-one million, two thousand, twelve".