20121214321 has 16 divisors (see below), whose sum is σ = 22140937728. Its totient is φ = 18169300800.

The previous prime is 20121214291. The next prime is 20121214363. The reversal of 20121214321 is 12341212102.

It is a cyclic number.

It is not a de Polignac number, because 20121214321 - 2¹¹ = 20121212273 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20121214381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1447876 + ... + 1461706.

It is an arithmetic number, because the mean of its divisors is an integer number (1383808608).

Almost surely, 2^20121214321 is an apocalyptic number.

It is an amenable number.

20121214321 is a deficient number, since it is larger than the sum of its proper divisors (2019723407).

20121214321 is a wasteful number, since it uses less digits than its factorization.

20121214321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16272.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 20121214321 its reverse (12341212102), we get a palindrome (32462426423).

The spelling of 20121214321 in words is "twenty billion, one hundred twenty-one million, two hundred fourteen thousand, three hundred twenty-one".