111212001029 has 2 divisors, whose sum is σ = 111212001030. Its totient is φ = 111212001028.

The previous prime is 111212001013. The next prime is 111212001031. The reversal of 111212001029 is 920100212111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106217328100 + 4994672929 = 325910^2 + 70673^2 .

It is a cyclic number.

It is not a de Polignac number, because 111212001029 - 2⁴ = 111212001013 is a prime.

Together with 111212001031, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111212001029.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111212001629) 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, 55606000514 + 55606000515.

It is an arithmetic number, because the mean of its divisors is an integer number (55606000515).

Almost surely, 2^111212001029 is an apocalyptic number.

It is an amenable number.

111212001029 is a deficient number, since it is larger than the sum of its proper divisors (1).

111212001029 is an equidigital number, since it uses as much as digits as its factorization.

111212001029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 20.

The spelling of 111212001029 in words is "one hundred eleven billion, two hundred twelve million, one thousand, twenty-nine".