116021681 has 8 divisors (see below), whose sum is σ = 117066600. Its totient is φ = 114980608.

The previous prime is 116021669. The next prime is 116021693. The reversal of 116021681 is 186120611.

It is an interprime number because it is at equal distance from previous prime (116021669) and next prime (116021693).

It can be written as a sum of positive squares in 4 ways, for example, as 20295025 + 95726656 = 4505^2 + 9784^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 116021681 - 2²⁶ = 48912817 is a prime.

It is a super-2 number, since 2×116021681² = 26922060924131522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 116021681.

It is not an unprimeable number, because it can be changed into a prime (116029681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118265 + ... + 119241.

It is an arithmetic number, because the mean of its divisors is an integer number (14633325).

Almost surely, 2^116021681 is an apocalyptic number.

It is an amenable number.

116021681 is a deficient number, since it is larger than the sum of its proper divisors (1044919).

116021681 is an equidigital number, since it uses as much as digits as its factorization.

116021681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1923.

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 116021681 is about 10771.3360823994. The cubic root of 116021681 is about 487.7302787589.

The spelling of 116021681 in words is "one hundred sixteen million, twenty-one thousand, six hundred eighty-one".