21301214121 has 12 divisors (see below), whose sum is σ = 33565549680. Its totient is φ = 12909826680.

The previous prime is 21301214119. The next prime is 21301214159. The reversal of 21301214121 is 12141210312.

21301214121 is a `hidden beast` number, since 2 + 130 + 121 + 412 + 1 = 666.

It is not a de Polignac number, because 21301214121 - 2¹ = 21301214119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21301214094 and 21301214103.

It is not an unprimeable number, because it can be changed into a prime (21301214021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 107581791 + ... + 107581988.

It is an arithmetic number, because the mean of its divisors is an integer number (2797129140).

Almost surely, 2^21301214121 is an apocalyptic number.

It is an amenable number.

21301214121 is a deficient number, since it is larger than the sum of its proper divisors (12264335559).

21301214121 is a wasteful number, since it uses less digits than its factorization.

21301214121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215163796 (or 215163793 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 21301214121 its reverse (12141210312), we get a palindrome (33442424433).

The spelling of 21301214121 in words is "twenty-one billion, three hundred one million, two hundred fourteen thousand, one hundred twenty-one".