21142020441043 has 16 divisors (see below), whose sum is σ = 21454866336960. Its totient is φ = 20831124787200.

The previous prime is 21142020440999. The next prime is 21142020441049. The reversal of 21142020441043 is 34014402024112.

It is a cyclic number.

It is not a de Polignac number, because 21142020441043 - 2⁹ = 21142020440531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21142020441049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 392721138 + ... + 392774968.

It is an arithmetic number, because the mean of its divisors is an integer number (1340929146060).

Almost surely, 2^{21142020441043} is an apocalyptic number.

21142020441043 is a deficient number, since it is larger than the sum of its proper divisors (312845895917).

21142020441043 is a wasteful number, since it uses less digits than its factorization.

21142020441043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71838.

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 21142020441043 its reverse (34014402024112), we get a palindrome (55156422465155).

The spelling of 21142020441043 in words is "twenty-one trillion, one hundred forty-two billion, twenty million, four hundred forty-one thousand, forty-three".