4020075121 has 2 divisors, whose sum is σ = 4020075122. Its totient is φ = 4020075120.

The previous prime is 4020075113. The next prime is 4020075127. The reversal of 4020075121 is 1215700204.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3893760000 + 126315121 = 62400^2 + 11239^2 .

It is a cyclic number.

It is not a de Polignac number, because 4020075121 - 2³ = 4020075113 is a prime.

It is a super-2 number, since 2×4020075121² = 32322007956966329282, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4020075092 and 4020075101.

It is not a weakly prime, because it can be changed into another prime (4020075127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010037560 + 2010037561.

It is an arithmetic number, because the mean of its divisors is an integer number (2010037561).

Almost surely, 2^4020075121 is an apocalyptic number.

It is an amenable number.

4020075121 is a deficient number, since it is larger than the sum of its proper divisors (1).

4020075121 is an equidigital number, since it uses as much as digits as its factorization.

4020075121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 4020075121 is about 63404.0623383076. The cubic root of 4020075121 is about 1590.0522273629.

Adding to 4020075121 its reverse (1215700204), we get a palindrome (5235775325).

The spelling of 4020075121 in words is "four billion, twenty million, seventy-five thousand, one hundred twenty-one".