100303434655621 has 16 divisors (see below), whose sum is σ = 102745248883200. Its totient is φ = 97866593858880.

The previous prime is 100303434655607. The next prime is 100303434655631. The reversal of 100303434655621 is 126556434303001.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100303434655621 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100303434655631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 943100355 + ... + 943206703.

It is an arithmetic number, because the mean of its divisors is an integer number (6421578055200).

Almost surely, 2^{100303434655621} is an apocalyptic number.

It is an amenable number.

100303434655621 is a deficient number, since it is larger than the sum of its proper divisors (2441814227579).

100303434655621 is a wasteful number, since it uses less digits than its factorization.

100303434655621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129516.

The product of its (nonzero) digits is 777600, while the sum is 43.

Adding to 100303434655621 its reverse (126556434303001), we get a palindrome (226859868958622).

The spelling of 100303434655621 in words is "one hundred trillion, three hundred three billion, four hundred thirty-four million, six hundred fifty-five thousand, six hundred twenty-one".