1020210081 has 8 divisors (see below), whose sum is σ = 1483941984. Its totient is φ = 618309120.

The previous prime is 1020210049. The next prime is 1020210089. The reversal of 1020210081 is 1800120201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1020210081 - 2⁵ = 1020210049 is a prime.

It is a super-2 number, since 2×1020210081² = 2081657218748053122, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1020210081.

It is not an unprimeable number, because it can be changed into a prime (1020210089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15457696 + ... + 15457761.

It is an arithmetic number, because the mean of its divisors is an integer number (185492748).

Almost surely, 2^1020210081 is an apocalyptic number.

1020210081 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1020210081 is a deficient number, since it is larger than the sum of its proper divisors (463731903).

1020210081 is a wasteful number, since it uses less digits than its factorization.

1020210081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30915471.

The product of its (nonzero) digits is 32, while the sum is 15.

The square root of 1020210081 is about 31940.7276216432. The cubic root of 1020210081 is about 1006.6918134126.

Adding to 1020210081 its reverse (1800120201), we get a palindrome (2820330282).

The spelling of 1020210081 in words is "one billion, twenty million, two hundred ten thousand, eighty-one".