20079121 has 2 divisors, whose sum is σ = 20079122. Its totient is φ = 20079120.

The previous prime is 20079119. The next prime is 20079127. The reversal of 20079121 is 12197002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12680721 + 7398400 = 3561^2 + 2720^2 .

It is a cyclic number.

It is not a de Polignac number, because 20079121 - 2¹ = 20079119 is a prime.

It is a super-2 number, since 2×20079121² = 806342200265282, which contains 22 as substring.

Together with 20079119, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 20079092 and 20079101.

It is not a weakly prime, because it can be changed into another prime (20079127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10039560 + 10039561.

It is an arithmetic number, because the mean of its divisors is an integer number (10039561).

Almost surely, 2^20079121 is an apocalyptic number.

It is an amenable number.

20079121 is a deficient number, since it is larger than the sum of its proper divisors (1).

20079121 is an equidigital number, since it uses as much as digits as its factorization.

20079121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 20079121 is about 4480.9732201833. The cubic root of 20079121 is about 271.7992364042.

The spelling of 20079121 in words is "twenty million, seventy-nine thousand, one hundred twenty-one".