1106701021561 has 2 divisors, whose sum is σ = 1106701021562. Its totient is φ = 1106701021560.

The previous prime is 1106701021541. The next prime is 1106701021661. The reversal of 1106701021561 is 1651201076011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 727668711225 + 379032310336 = 853035^2 + 615656^2 .

It is an emirp because it is prime and its reverse (1651201076011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1106701021561 - 2¹⁵ = 1106700988793 is a prime.

It is a super-2 number, since 2×1106701021561² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1106701021541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 553350510780 + 553350510781.

It is an arithmetic number, because the mean of its divisors is an integer number (553350510781).

Almost surely, 2^{1106701021561} is an apocalyptic number.

It is an amenable number.

1106701021561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1106701021561 is an equidigital number, since it uses as much as digits as its factorization.

1106701021561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 31.

Adding to 1106701021561 its reverse (1651201076011), we get a palindrome (2757902097572).

The spelling of 1106701021561 in words is "one trillion, one hundred six billion, seven hundred one million, twenty-one thousand, five hundred sixty-one".