21230033121 has 32 divisors (see below), whose sum is σ = 34794455040. Its totient is φ = 12685453200.

The previous prime is 21230033063. The next prime is 21230033141. The reversal of 21230033121 is 12133003212.

21230033121 is a `hidden beast` number, since 2 + 12 + 300 + 331 + 21 = 666.

It is not a de Polignac number, because 21230033121 - 2¹⁴ = 21230016737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21230033094 and 21230033103.

It is not an unprimeable number, because it can be changed into a prime (21230033141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 482305 + ... + 524478.

It is an arithmetic number, because the mean of its divisors is an integer number (1087326720).

Almost surely, 2^21230033121 is an apocalyptic number.

It is an amenable number.

21230033121 is a deficient number, since it is larger than the sum of its proper divisors (13564421919).

21230033121 is a wasteful number, since it uses less digits than its factorization.

21230033121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1006874 (or 1006868 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21230033121 its reverse (12133003212), we get a palindrome (33363036333).

The spelling of 21230033121 in words is "twenty-one billion, two hundred thirty million, thirty-three thousand, one hundred twenty-one".