2106242661 has 8 divisors (see below), whose sum is σ = 2811161344. Its totient is φ = 1402742880.

The previous prime is 2106242657. The next prime is 2106242669. The reversal of 2106242661 is 1662426012.

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

It is not a de Polignac number, because 2106242661 - 2² = 2106242657 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 (2106242669) 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, 351256 + ... + 357201.

It is an arithmetic number, because the mean of its divisors is an integer number (351395168).

Almost surely, 2^2106242661 is an apocalyptic number.

It is an amenable number.

2106242661 is a deficient number, since it is larger than the sum of its proper divisors (704918683).

2106242661 is an equidigital number, since it uses as much as digits as its factorization.

2106242661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709451.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 2106242661 is about 45893.8194204841. The cubic root of 2106242661 is about 1281.8468337501.

Adding to 2106242661 its reverse (1662426012), we get a palindrome (3768668673).

The spelling of 2106242661 in words is "two billion, one hundred six million, two hundred forty-two thousand, six hundred sixty-one".