111222012001 has 2 divisors, whose sum is σ = 111222012002. Its totient is φ = 111222012000.

The previous prime is 111222011933. The next prime is 111222012023. The reversal of 111222012001 is 100210222111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110154291025 + 1067720976 = 331895^2 + 32676^2 .

It is an emirp because it is prime and its reverse (100210222111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111222012001 - 2⁹ = 111222011489 is a prime.

It is not a weakly prime, because it can be changed into another prime (111222012301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55611006000 + 55611006001.

It is an arithmetic number, because the mean of its divisors is an integer number (55611006001).

Almost surely, 2^111222012001 is an apocalyptic number.

It is an amenable number.

111222012001 is a deficient number, since it is larger than the sum of its proper divisors (1).

111222012001 is an equidigital number, since it uses as much as digits as its factorization.

111222012001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 111222012001 its reverse (100210222111), we get a palindrome (211432234112).

The spelling of 111222012001 in words is "one hundred eleven billion, two hundred twenty-two million, twelve thousand, one".