21411103021 has 16 divisors (see below), whose sum is σ = 28099330560. Its totient is φ = 15805871280.

The previous prime is 21411103003. The next prime is 21411103027. The reversal of 21411103021 is 12030111412.

It is a cyclic number.

It is not a de Polignac number, because 21411103021 - 2⁵ = 21411102989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21411102986 and 21411103004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21411103027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7316071 + ... + 7318996.

It is an arithmetic number, because the mean of its divisors is an integer number (1756208160).

Almost surely, 2^21411103021 is an apocalyptic number.

It is an amenable number.

21411103021 is a deficient number, since it is larger than the sum of its proper divisors (6688227539).

21411103021 is a wasteful number, since it uses less digits than its factorization.

21411103021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14635104.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21411103021 its reverse (12030111412), we get a palindrome (33441214433).

The spelling of 21411103021 in words is "twenty-one billion, four hundred eleven million, one hundred three thousand, twenty-one".