111212144321 has 2 divisors, whose sum is σ = 111212144322. Its totient is φ = 111212144320.

The previous prime is 111212144293. The next prime is 111212144353. The reversal of 111212144321 is 123441212111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105196435600 + 6015708721 = 324340^2 + 77561^2 .

It is a cyclic number.

It is not a de Polignac number, because 111212144321 - 2²² = 111207950017 is a prime.

It is not a weakly prime, because it can be changed into another prime (111212144221) 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 as a sum of consecutive naturals, namely, 55606072160 + 55606072161.

It is an arithmetic number, because the mean of its divisors is an integer number (55606072161).

Almost surely, 2^111212144321 is an apocalyptic number.

It is an amenable number.

111212144321 is a deficient number, since it is larger than the sum of its proper divisors (1).

111212144321 is an equidigital number, since it uses as much as digits as its factorization.

111212144321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 384, while the sum is 23.

Adding to 111212144321 its reverse (123441212111), we get a palindrome (234653356432).

The spelling of 111212144321 in words is "one hundred eleven billion, two hundred twelve million, one hundred forty-four thousand, three hundred twenty-one".