21441105102040 has 32 divisors (see below), whose sum is σ = 51953446979280. Its totient is φ = 7916715729792.

The previous prime is 21441105102023. The next prime is 21441105102077. The reversal of 21441105102040 is 4020150114412.

It is a junction number, because it is equal to n+sod(n) for n = 21441105101996 and 21441105102014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20616446694 + ... + 20616447733.

Almost surely, 2^{21441105102040} is an apocalyptic number.

21441105102040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21441105102040 is an abundant number, since it is smaller than the sum of its proper divisors (30512341877240).

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

21441105102040 is a wasteful number, since it uses less digits than its factorization.

21441105102040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41232894451 (or 41232894447 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 25.

Adding to 21441105102040 its reverse (4020150114412), we get a palindrome (25461255216452).

The spelling of 21441105102040 in words is "twenty-one trillion, four hundred forty-one billion, one hundred five million, one hundred two thousand, forty".