2021425129 has 2 divisors, whose sum is σ = 2021425130. Its totient is φ = 2021425128.

The previous prime is 2021425121. The next prime is 2021425151. The reversal of 2021425129 is 9215241202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1540719504 + 480705625 = 39252^2 + 21925^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021425129 - 2³ = 2021425121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2021425097 and 2021425106.

It is not a weakly prime, because it can be changed into another prime (2021425121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010712564 + 1010712565.

It is an arithmetic number, because the mean of its divisors is an integer number (1010712565).

Almost surely, 2^2021425129 is an apocalyptic number.

It is an amenable number.

2021425129 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021425129 is an equidigital number, since it uses as much as digits as its factorization.

2021425129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 2021425129 is about 44960.2616651638. The cubic root of 2021425129 is about 1264.4040747405.

The spelling of 2021425129 in words is "two billion, twenty-one million, four hundred twenty-five thousand, one hundred twenty-nine".