21143064446412 has 12 divisors (see below), whose sum is σ = 49333817041656. Its totient is φ = 7047688148800.

The previous prime is 21143064446407. The next prime is 21143064446431. The reversal of 21143064446412 is 21464446034112.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 880961018589 + ... + 880961018612.

It is an arithmetic number, because the mean of its divisors is an integer number (4111151420138).

Almost surely, 2^{21143064446412} is an apocalyptic number.

It is an amenable number.

21143064446412 is an abundant number, since it is smaller than the sum of its proper divisors (28190752595244).

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

21143064446412 is a wasteful number, since it uses less digits than its factorization.

21143064446412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1761922037208 (or 1761922037206 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 42.

The spelling of 21143064446412 in words is "twenty-one trillion, one hundred forty-three billion, sixty-four million, four hundred forty-six thousand, four hundred twelve".