130206021 has 32 divisors (see below), whose sum is σ = 196162560. Its totient is φ = 76137600.

The previous prime is 130206019. The next prime is 130206029. The reversal of 130206021 is 120602031.

It is not a de Polignac number, because 130206021 - 2¹ = 130206019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130206029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 125776 + ... + 126806.

It is an arithmetic number, because the mean of its divisors is an integer number (6130080).

Almost surely, 2^130206021 is an apocalyptic number.

130206021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

130206021 is a deficient number, since it is larger than the sum of its proper divisors (65956539).

130206021 is a wasteful number, since it uses less digits than its factorization.

130206021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1177.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 130206021 is about 11410.7852928710. The cubic root of 130206021 is about 506.8471659433.

Adding to 130206021 its reverse (120602031), we get a palindrome (250808052).

The spelling of 130206021 in words is "one hundred thirty million, two hundred six thousand, twenty-one".