130202021 has 2 divisors, whose sum is σ = 130202022. Its totient is φ = 130202020.

The previous prime is 130201993. The next prime is 130202047. The reversal of 130202021 is 120202031.

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., 122965921 + 7236100 = 11089^2 + 2690^2 .

It is a cyclic number.

It is not a de Polignac number, because 130202021 - 2¹⁰ = 130200997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 130201993 and 130202011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (130202071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65101010 + 65101011.

It is an arithmetic number, because the mean of its divisors is an integer number (65101011).

Almost surely, 2^130202021 is an apocalyptic number.

It is an amenable number.

130202021 is a deficient number, since it is larger than the sum of its proper divisors (1).

130202021 is an equidigital number, since it uses as much as digits as its factorization.

130202021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 130202021 is about 11410.6100187501. The cubic root of 130202021 is about 506.8419756830.

Adding to 130202021 its reverse (120202031), we get a palindrome (250404052).

The spelling of 130202021 in words is "one hundred thirty million, two hundred two thousand, twenty-one".