21061155007052 has 12 divisors (see below), whose sum is σ = 37853156972400. Its totient is φ = 10245967300656.

The previous prime is 21061155007033. The next prime is 21061155007097. The reversal of 21061155007052 is 25070055116012.

It is an unprimeable number.

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, 71152550552 + ... + 71152550847.

It is an arithmetic number, because the mean of its divisors is an integer number (3154429747700).

Almost surely, 2^{21061155007052} is an apocalyptic number.

It is an amenable number.

21061155007052 is a deficient number, since it is larger than the sum of its proper divisors (16792001965348).

21061155007052 is a wasteful number, since it uses less digits than its factorization.

21061155007052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142305101440 (or 142305101438 counting only the distinct ones).

The product of its (nonzero) digits is 21000, while the sum is 35.

The spelling of 21061155007052 in words is "twenty-one trillion, sixty-one billion, one hundred fifty-five million, seven thousand, fifty-two".