21261163066302 has 32 divisors (see below), whose sum is σ = 42756465952512. Its totient is φ = 7048104615104.

The previous prime is 21261163066289. The next prime is 21261163066331. The reversal of 21261163066302 is 20366036116212.

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, 8038698 + ... + 10350989.

It is an arithmetic number, because the mean of its divisors is an integer number (1336139561016).

Almost surely, 2^{21261163066302} is an apocalyptic number.

21261163066302 is an abundant number, since it is smaller than the sum of its proper divisors (21495302886210).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21261163066302 is a wasteful number, since it uses less digits than its factorization.

21261163066302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18390752.

The product of its (nonzero) digits is 93312, while the sum is 39.

The spelling of 21261163066302 in words is "twenty-one trillion, two hundred sixty-one billion, one hundred sixty-three million, sixty-six thousand, three hundred two".