111011221222001 has 2 divisors, whose sum is σ = 111011221222002. Its totient is φ = 111011221222000.

The previous prime is 111011221221973. The next prime is 111011221222039. The reversal of 111011221222001 is 100222122110111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110966757173776 + 44464048225 = 10534076^2 + 210865^2 .

It is a cyclic number.

It is not a de Polignac number, because 111011221222001 - 2⁶ = 111011221221937 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (111011221222091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55505610611000 + 55505610611001.

It is an arithmetic number, because the mean of its divisors is an integer number (55505610611001).

Almost surely, 2^{111011221222001} is an apocalyptic number.

It is an amenable number.

111011221222001 is a deficient number, since it is larger than the sum of its proper divisors (1).

111011221222001 is an equidigital number, since it uses as much as digits as its factorization.

111011221222001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 111011221222001 its reverse (100222122110111), we get a palindrome (211233343332112).

The spelling of 111011221222001 in words is "one hundred eleven trillion, eleven billion, two hundred twenty-one million, two hundred twenty-two thousand, one".