21214331222121 has 12 divisors (see below), whose sum is σ = 30642963486720. Its totient is φ = 14142868738200.

The previous prime is 21214331222039. The next prime is 21214331222159. The reversal of 21214331222121 is 12122213341212.

21214331222121 is a `hidden beast` number, since 2 + 1 + 2 + 1 + 433 + 1 + 2 + 221 + 2 + 1 = 666.

It is not a de Polignac number, because 21214331222121 - 2²⁷ = 21214197004393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21214331222221) 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, 10547896 + ... + 12397046.

It is an arithmetic number, because the mean of its divisors is an integer number (2553580290560).

Almost surely, 2^{21214331222121} is an apocalyptic number.

It is an amenable number.

21214331222121 is a deficient number, since it is larger than the sum of its proper divisors (9428632264599).

21214331222121 is a wasteful number, since it uses less digits than its factorization.

21214331222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3123876 (or 3123873 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

Adding to 21214331222121 its reverse (12122213341212), we get a palindrome (33336544563333).

The spelling of 21214331222121 in words is "twenty-one trillion, two hundred fourteen billion, three hundred thirty-one million, two hundred twenty-two thousand, one hundred twenty-one".