1116710121661 has 4 divisors (see below), whose sum is σ = 1121717790592. Its totient is φ = 1111702452732.

The previous prime is 1116710121607. The next prime is 1116710121697. The reversal of 1116710121661 is 1661210176111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1116710121661 - 2¹⁹ = 1116709597373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1116710121601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2503834131 + ... + 2503834576.

It is an arithmetic number, because the mean of its divisors is an integer number (280429447648).

Almost surely, 2^{1116710121661} is an apocalyptic number.

It is an amenable number.

1116710121661 is a deficient number, since it is larger than the sum of its proper divisors (5007668931).

1116710121661 is an equidigital number, since it uses as much as digits as its factorization.

1116710121661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5007668930.

The product of its (nonzero) digits is 3024, while the sum is 34.

Adding to 1116710121661 its reverse (1661210176111), we get a palindrome (2777920297772).

The spelling of 1116710121661 in words is "one trillion, one hundred sixteen billion, seven hundred ten million, one hundred twenty-one thousand, six hundred sixty-one".