20026121 has 2 divisors, whose sum is σ = 20026122. Its totient is φ = 20026120.

The previous prime is 20026067. The next prime is 20026129. The reversal of 20026121 is 12162002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16491721 + 3534400 = 4061^2 + 1880^2 .

It is a cyclic number.

It is not a de Polignac number, because 20026121 - 2¹⁸ = 19763977 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20026096 and 20026105.

It is not a weakly prime, because it can be changed into another prime (20026129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10013060 + 10013061.

It is an arithmetic number, because the mean of its divisors is an integer number (10013061).

Almost surely, 2^20026121 is an apocalyptic number.

It is an amenable number.

20026121 is a deficient number, since it is larger than the sum of its proper divisors (1).

20026121 is an equidigital number, since it uses as much as digits as its factorization.

20026121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 20026121 is about 4475.0554186513. The cubic root of 20026121 is about 271.5598824215.

Adding to 20026121 its reverse (12162002), we get a palindrome (32188123).

The spelling of 20026121 in words is "twenty million, twenty-six thousand, one hundred twenty-one".