1212031030111 has 16 divisors (see below), whose sum is σ = 1326612971520. Its totient is φ = 1098184790080.

The previous prime is 1212031030019. The next prime is 1212031030187. The reversal of 1212031030111 is 1110301302121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1212031030111 - 2¹¹ = 1212031028063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212031070111) 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 15 ways as a sum of consecutive naturals, for example, 8698530 + ... + 8836768.

It is an arithmetic number, because the mean of its divisors is an integer number (82913310720).

Almost surely, 2^{1212031030111} is an apocalyptic number.

1212031030111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1212031030111 is a deficient number, since it is larger than the sum of its proper divisors (114581941409).

1212031030111 is a wasteful number, since it uses less digits than its factorization.

1212031030111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140894.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 1212031030111 its reverse (1110301302121), we get a palindrome (2322332332232).

The spelling of 1212031030111 in words is "one trillion, two hundred twelve billion, thirty-one million, thirty thousand, one hundred eleven".