21241031020 has 24 divisors (see below), whose sum is σ = 48661271568. Its totient is φ = 7724011200.

The previous prime is 21241031011. The next prime is 21241031027. The reversal of 21241031020 is 2013014212.

It is a junction number, because it is equal to n+sod(n) for n = 21241030985 and 21241031003.

It is not an unprimeable number, because it can be changed into a prime (21241031027) 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, 48274851 + ... + 48275290.

It is an arithmetic number, because the mean of its divisors is an integer number (2027552982).

Almost surely, 2^21241031020 is an apocalyptic number.

21241031020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21241031020 is an abundant number, since it is smaller than the sum of its proper divisors (27420240548).

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

21241031020 is a wasteful number, since it uses less digits than its factorization.

21241031020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96550161 (or 96550159 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21241031020 its reverse (2013014212), we get a palindrome (23254045232).

The spelling of 21241031020 in words is "twenty-one billion, two hundred forty-one million, thirty-one thousand, twenty".