1100111221061 has 2 divisors, whose sum is σ = 1100111221062. Its totient is φ = 1100111221060.

The previous prime is 1100111221057. The next prime is 1100111221127. The reversal of 1100111221061 is 1601221110011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 987302564161 + 112808656900 = 993631^2 + 335870^2 .

It is a cyclic number.

It is not a de Polignac number, because 1100111221061 - 2² = 1100111221057 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1100111221051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550055610530 + 550055610531.

It is an arithmetic number, because the mean of its divisors is an integer number (550055610531).

Almost surely, 2^{1100111221061} is an apocalyptic number.

It is an amenable number.

1100111221061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1100111221061 is an equidigital number, since it uses as much as digits as its factorization.

1100111221061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 17.

Adding to 1100111221061 its reverse (1601221110011), we get a palindrome (2701332331072).

The spelling of 1100111221061 in words is "one trillion, one hundred billion, one hundred eleven million, two hundred twenty-one thousand, sixty-one".