111221130212111 has 2 divisors, whose sum is σ = 111221130212112. Its totient is φ = 111221130212110.

The previous prime is 111221130212099. The next prime is 111221130212117. The reversal of 111221130212111 is 111212031122111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111221130212111 - 2³⁸ = 110946252305167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111221130212117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55610565106055 + 55610565106056.

It is an arithmetic number, because the mean of its divisors is an integer number (55610565106056).

Almost surely, 2^{111221130212111} is an apocalyptic number.

111221130212111 is a deficient number, since it is larger than the sum of its proper divisors (1).

111221130212111 is an equidigital number, since it uses as much as digits as its factorization.

111221130212111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 20.

Adding to 111221130212111 its reverse (111212031122111), we get a palindrome (222433161334222).

The spelling of 111221130212111 in words is "one hundred eleven trillion, two hundred twenty-one billion, one hundred thirty million, two hundred twelve thousand, one hundred eleven".