20132121 has 16 divisors (see below), whose sum is σ = 27813888. Its totient is φ = 12944400.

The previous prime is 20132117. The next prime is 20132129. The reversal of 20132121 is 12123102.

It is not a de Polignac number, because 20132121 - 2² = 20132117 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20132097 and 20132106.

It is not an unprimeable number, because it can be changed into a prime (20132129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9006 + ... + 11016.

It is an arithmetic number, because the mean of its divisors is an integer number (1738368).

Almost surely, 2^20132121 is an apocalyptic number.

It is an amenable number.

20132121 is a deficient number, since it is larger than the sum of its proper divisors (7681767).

20132121 is a wasteful number, since it uses less digits than its factorization.

20132121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2132.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 20132121 is about 4486.8832166661. The cubic root of 20132121 is about 272.0381695641.

Adding to 20132121 its reverse (12123102), we get a palindrome (32255223).

The spelling of 20132121 in words is "twenty million, one hundred thirty-two thousand, one hundred twenty-one".