21014330121 has 16 divisors (see below), whose sum is σ = 32485921920. Its totient is φ = 13400442000.

The previous prime is 21014330111. The next prime is 21014330123. The reversal of 21014330121 is 12103341012.

21014330121 is a `hidden beast` number, since 210 + 1 + 4 + 330 + 121 = 666.

It is not a de Polignac number, because 21014330121 - 2⁵ = 21014330089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21014330094 and 21014330103.

It is not an unprimeable number, because it can be changed into a prime (21014330123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16919130 + ... + 16920371.

It is an arithmetic number, because the mean of its divisors is an integer number (2030370120).

Almost surely, 2^21014330121 is an apocalyptic number.

It is an amenable number.

21014330121 is a deficient number, since it is larger than the sum of its proper divisors (11471591799).

21014330121 is a wasteful number, since it uses less digits than its factorization.

21014330121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33839533 (or 33839527 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 21014330121 its reverse (12103341012), we get a palindrome (33117671133).

The spelling of 21014330121 in words is "twenty-one billion, fourteen million, three hundred thirty thousand, one hundred twenty-one".