21141404242021 has 24 divisors (see below), whose sum is σ = 24632089148160. Its totient is φ = 18092468695392.

The previous prime is 21141404241973. The next prime is 21141404242027. The reversal of 21141404242021 is 12024240414112.

It is not a de Polignac number, because 21141404242021 - 2²⁵ = 21141370687589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21141404242027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81990720 + ... + 82248166.

It is an arithmetic number, because the mean of its divisors is an integer number (1026337047840).

Almost surely, 2^{21141404242021} is an apocalyptic number.

It is an amenable number.

21141404242021 is a deficient number, since it is larger than the sum of its proper divisors (3490684906139).

21141404242021 is a wasteful number, since it uses less digits than its factorization.

21141404242021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260113 (or 260106 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 28.

Adding to 21141404242021 its reverse (12024240414112), we get a palindrome (33165644656133).

The spelling of 21141404242021 in words is "twenty-one trillion, one hundred forty-one billion, four hundred four million, two hundred forty-two thousand, twenty-one".