110011121110661 has 2 divisors, whose sum is σ = 110011121110662. Its totient is φ = 110011121110660.

The previous prime is 110011121110643. The next prime is 110011121110727. The reversal of 110011121110661 is 166011121110011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73340708638561 + 36670412472100 = 8563919^2 + 6055610^2 .

It is a cyclic number.

It is not a de Polignac number, because 110011121110661 - 2⁴⁶ = 39642376932997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (110011121110061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55005560555330 + 55005560555331.

It is an arithmetic number, because the mean of its divisors is an integer number (55005560555331).

Almost surely, 2^{110011121110661} is an apocalyptic number.

It is an amenable number.

110011121110661 is a deficient number, since it is larger than the sum of its proper divisors (1).

110011121110661 is an equidigital number, since it uses as much as digits as its factorization.

110011121110661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 23.

Adding to 110011121110661 its reverse (166011121110011), we get a palindrome (276022242220672).

The spelling of 110011121110661 in words is "one hundred ten trillion, eleven billion, one hundred twenty-one million, one hundred ten thousand, six hundred sixty-one".