1021601029 has 2 divisors, whose sum is σ = 1021601030. Its totient is φ = 1021601028.

The previous prime is 1021600999. The next prime is 1021601039. The reversal of 1021601029 is 9201061201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 979377025 + 42224004 = 31295^2 + 6498^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021601029 - 2⁵ = 1021600997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021601039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510800514 + 510800515.

It is an arithmetic number, because the mean of its divisors is an integer number (510800515).

Almost surely, 2^1021601029 is an apocalyptic number.

It is an amenable number.

1021601029 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021601029 is an equidigital number, since it uses as much as digits as its factorization.

1021601029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 1021601029 is about 31962.4940985524. The cubic root of 1021601029 is about 1007.1491114095.

The spelling of 1021601029 in words is "one billion, twenty-one million, six hundred one thousand, twenty-nine".