82121030 has 32 divisors (see below), whose sum is σ = 150764544. Its totient is φ = 32200416.

The previous prime is 82120993. The next prime is 82121041. The reversal of 82121030 is 3012128.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134987 + ... + 135593.

It is an arithmetic number, because the mean of its divisors is an integer number (4711392).

Almost surely, 2^82121030 is an apocalyptic number.

82121030 is a deficient number, since it is larger than the sum of its proper divisors (68643514).

82121030 is a wasteful number, since it uses less digits than its factorization.

82121030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 82121030 is about 9062.0654378569. The cubic root of 82121030 is about 434.6617884592.

Adding to 82121030 its reverse (3012128), we get a palindrome (85133158).

The spelling of 82121030 in words is "eighty-two million, one hundred twenty-one thousand, thirty".