1101011021161 has 2 divisors, whose sum is σ = 1101011021162. Its totient is φ = 1101011021160.

The previous prime is 1101011021147. The next prime is 1101011021333. The reversal of 1101011021161 is 1611201101011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 943734531600 + 157276489561 = 971460^2 + 396581^2 .

It is a cyclic number.

It is not a de Polignac number, because 1101011021161 - 2²³ = 1101002632553 is a prime.

It is not a weakly prime, because it can be changed into another prime (1101011025161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550505510580 + 550505510581.

It is an arithmetic number, because the mean of its divisors is an integer number (550505510581).

Almost surely, 2^{1101011021161} is an apocalyptic number.

It is an amenable number.

1101011021161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1101011021161 is an equidigital number, since it uses as much as digits as its factorization.

1101011021161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 16.

Adding to 1101011021161 its reverse (1611201101011), we get a palindrome (2712212122172).

The spelling of 1101011021161 in words is "one trillion, one hundred one billion, eleven million, twenty-one thousand, one hundred sixty-one".