21126143062643 has 8 divisors (see below), whose sum is σ = 21152018544048. Its totient is φ = 21100268379904.

The previous prime is 21126143062613. The next prime is 21126143062657. The reversal of 21126143062643 is 34626034162112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21126143062643 - 2²² = 21126138868339 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21126143062643.

It is not an unprimeable number, because it can be changed into a prime (21126143062613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66226655 + ... + 66544887.

It is an arithmetic number, because the mean of its divisors is an integer number (2644002318006).

Almost surely, 2^{21126143062643} is an apocalyptic number.

21126143062643 is a deficient number, since it is larger than the sum of its proper divisors (25875481405).

21126143062643 is an equidigital number, since it uses as much as digits as its factorization.

21126143062643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399333.

The product of its (nonzero) digits is 248832, while the sum is 41.

The spelling of 21126143062643 in words is "twenty-one trillion, one hundred twenty-six billion, one hundred forty-three million, sixty-two thousand, six hundred forty-three".