111020102021161 has 2 divisors, whose sum is σ = 111020102021162. Its totient is φ = 111020102021160.

The previous prime is 111020102021107. The next prime is 111020102021177. The reversal of 111020102021161 is 161120201020111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81213350304025 + 29806751717136 = 9011845^2 + 5459556^2 .

It is a cyclic number.

It is not a de Polignac number, because 111020102021161 - 2⁷ = 111020102021033 is a prime.

It is not a weakly prime, because it can be changed into another prime (111020102021861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55510051010580 + 55510051010581.

It is an arithmetic number, because the mean of its divisors is an integer number (55510051010581).

Almost surely, 2^{111020102021161} is an apocalyptic number.

It is an amenable number.

111020102021161 is a deficient number, since it is larger than the sum of its proper divisors (1).

111020102021161 is an equidigital number, since it uses as much as digits as its factorization.

111020102021161 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 19.

Adding to 111020102021161 its reverse (161120201020111), we get a palindrome (272140303041272).

The spelling of 111020102021161 in words is "one hundred eleven trillion, twenty billion, one hundred two million, twenty-one thousand, one hundred sixty-one".