1020802101 has 48 divisors (see below), whose sum is σ = 1542808512. Its totient is φ = 599639040.

The previous prime is 1020802091. The next prime is 1020802103. The reversal of 1020802101 is 1012080201.

1020802101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-1020802101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020802103) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1865910 + ... + 1866456.

It is an arithmetic number, because the mean of its divisors is an integer number (32141844).

Almost surely, 2^1020802101 is an apocalyptic number.

1020802101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1020802101 is a deficient number, since it is larger than the sum of its proper divisors (522006411).

1020802101 is a wasteful number, since it uses less digits than its factorization.

1020802101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722 (or 711 counting only the distinct ones).

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

The square root of 1020802101 is about 31949.9937558679. The cubic root of 1020802101 is about 1006.8865009103.

Adding to 1020802101 its reverse (1012080201), we get a palindrome (2032882302).

The spelling of 1020802101 in words is "one billion, twenty million, eight hundred two thousand, one hundred one".