2121403650347 has 4 divisors (see below), whose sum is σ = 2135452681296. Its totient is φ = 2107354619400.

The previous prime is 2121403650329. The next prime is 2121403650367. The reversal of 2121403650347 is 7430563041212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121403650347 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2121403650347.

It is not an unprimeable number, because it can be changed into a prime (2121403650367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7024515248 + ... + 7024515549.

It is an arithmetic number, because the mean of its divisors is an integer number (533863170324).

Almost surely, 2^{2121403650347} is an apocalyptic number.

2121403650347 is a deficient number, since it is larger than the sum of its proper divisors (14049030949).

2121403650347 is a wasteful number, since it uses less digits than its factorization.

2121403650347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14049030948.

The product of its (nonzero) digits is 120960, while the sum is 38.

Adding to 2121403650347 its reverse (7430563041212), we get a palindrome (9551966691559).

The spelling of 2121403650347 in words is "two trillion, one hundred twenty-one billion, four hundred three million, six hundred fifty thousand, three hundred forty-seven".