111222120001001 has 2 divisors, whose sum is σ = 111222120001002. Its totient is φ = 111222120001000.

The previous prime is 111222120000991. The next prime is 111222120001043. The reversal of 111222120001001 is 100100021222111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103477314864400 + 7744805136601 = 10172380^2 + 2782949^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111222120001001 is a prime.

It is not a weakly prime, because it can be changed into another prime (111222120001301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55611060000500 + 55611060000501.

It is an arithmetic number, because the mean of its divisors is an integer number (55611060000501).

Almost surely, 2^{111222120001001} is an apocalyptic number.

It is an amenable number.

111222120001001 is a deficient number, since it is larger than the sum of its proper divisors (1).

111222120001001 is an equidigital number, since it uses as much as digits as its factorization.

111222120001001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 111222120001001 its reverse (100100021222111), we get a palindrome (211322141223112).

The spelling of 111222120001001 in words is "one hundred eleven trillion, two hundred twenty-two billion, one hundred twenty million, one thousand, one".