111121122220001 has 2 divisors, whose sum is σ = 111121122220002. Its totient is φ = 111121122220000.

The previous prime is 111121122219949. The next prime is 111121122220007. The reversal of 111121122220001 is 100022221121111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101050343664400 + 10070778555601 = 10052380^2 + 3173449^2 .

It is a cyclic number.

It is not a de Polignac number, because 111121122220001 - 2¹⁴ = 111121122203617 is a prime.

It is not a weakly prime, because it can be changed into another prime (111121122220007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55560561110000 + 55560561110001.

It is an arithmetic number, because the mean of its divisors is an integer number (55560561110001).

Almost surely, 2^{111121122220001} is an apocalyptic number.

It is an amenable number.

111121122220001 is a deficient number, since it is larger than the sum of its proper divisors (1).

111121122220001 is an equidigital number, since it uses as much as digits as its factorization.

111121122220001 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 111121122220001 its reverse (100022221121111), we get a palindrome (211143343341112).

The spelling of 111121122220001 in words is "one hundred eleven trillion, one hundred twenty-one billion, one hundred twenty-two million, two hundred twenty thousand, one".