2021432129 has 2 divisors, whose sum is σ = 2021432130. Its totient is φ = 2021432128.

The previous prime is 2021432113. The next prime is 2021432183. The reversal of 2021432129 is 9212341202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1544097025 + 477335104 = 39295^2 + 21848^2 .

It is a cyclic number.

It is not a de Polignac number, because 2021432129 - 2⁴ = 2021432113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2021432098 and 2021432107.

It is not a weakly prime, because it can be changed into another prime (2021402129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010716064 + 1010716065.

It is an arithmetic number, because the mean of its divisors is an integer number (1010716065).

Almost surely, 2^2021432129 is an apocalyptic number.

It is an amenable number.

2021432129 is a deficient number, since it is larger than the sum of its proper divisors (1).

2021432129 is an equidigital number, since it uses as much as digits as its factorization.

2021432129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 2021432129 is about 44960.3395116185. The cubic root of 2021432129 is about 1264.4055342419.

The spelling of 2021432129 in words is "two billion, twenty-one million, four hundred thirty-two thousand, one hundred twenty-nine".