2121381763 has 8 divisors (see below), whose sum is σ = 2162862000. Its totient is φ = 2079955488.

The previous prime is 2121381751. The next prime is 2121381781. The reversal of 2121381763 is 3671831212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121381763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121381733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71013 + ... + 96361.

It is an arithmetic number, because the mean of its divisors is an integer number (270357750).

Almost surely, 2^2121381763 is an apocalyptic number.

2121381763 is a deficient number, since it is larger than the sum of its proper divisors (41480237).

2121381763 is a wasteful number, since it uses less digits than its factorization.

2121381763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26981.

The product of its digits is 12096, while the sum is 34.

The square root of 2121381763 is about 46058.4602760448. The cubic root of 2121381763 is about 1284.9106940312.

The spelling of 2121381763 in words is "two billion, one hundred twenty-one million, three hundred eighty-one thousand, seven hundred sixty-three".