21042131402041 has 8 divisors (see below), whose sum is σ = 21101286507840. Its totient is φ = 20982990959472.

The previous prime is 21042131402023. The next prime is 21042131402111. The reversal of 21042131402041 is 14020413124012.

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 21042131402041 - 2⁴³ = 12246038379833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21042131401997 and 21042131402015.

It is not an unprimeable number, because it can be changed into a prime (21042131400041) 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, 788551 + ... + 6534988.

It is an arithmetic number, because the mean of its divisors is an integer number (2637660813480).

Almost surely, 2^{21042131402041} is an apocalyptic number.

It is an amenable number.

21042131402041 is a deficient number, since it is larger than the sum of its proper divisors (59155105799).

21042131402041 is an equidigital number, since it uses as much as digits as its factorization.

21042131402041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7331615.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 21042131402041 its reverse (14020413124012), we get a palindrome (35062544526053).

The spelling of 21042131402041 in words is "twenty-one trillion, forty-two billion, one hundred thirty-one million, four hundred two thousand, forty-one".