1212131030231 has 16 divisors (see below), whose sum is σ = 1330531805088. Its totient is φ = 1095103497600.

The previous prime is 1212131030213. The next prime is 1212131030233. The reversal of 1212131030231 is 1320301312121.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212131030231 is a prime.

It is a super-2 number, since 2×1212131030231² (a number of 25 digits) 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 (1212131030233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4397285 + ... + 4664801.

It is an arithmetic number, because the mean of its divisors is an integer number (83158237818).

Almost surely, 2^{1212131030231} is an apocalyptic number.

1212131030231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1212131030231 is a deficient number, since it is larger than the sum of its proper divisors (118400774857).

1212131030231 is a wasteful number, since it uses less digits than its factorization.

1212131030231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270082.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1212131030231 its reverse (1320301312121), we get a palindrome (2532432342352).

The spelling of 1212131030231 in words is "one trillion, two hundred twelve billion, one hundred thirty-one million, thirty thousand, two hundred thirty-one".