21050301999965 has 16 divisors (see below), whose sum is σ = 29046095948928. Its totient is φ = 14345937625536.

The previous prime is 21050301999941. The next prime is 21050302000111. The reversal of 21050301999965 is 56999910305012.

It is a cyclic number.

It is not a de Polignac number, because 21050301999965 - 2⁶ = 21050301999901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1844893682 + ... + 1844905091.

It is an arithmetic number, because the mean of its divisors is an integer number (1815380996808).

Almost surely, 2^{21050301999965} is an apocalyptic number.

It is an amenable number.

21050301999965 is a deficient number, since it is larger than the sum of its proper divisors (7995793948963).

21050301999965 is a wasteful number, since it uses less digits than its factorization.

21050301999965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3689798948.

The product of its (nonzero) digits is 5904900, while the sum is 59.

The spelling of 21050301999965 in words is "twenty-one trillion, fifty billion, three hundred one million, nine hundred ninety-nine thousand, nine hundred sixty-five".