1001202020 has 48 divisors (see below), whose sum is σ = 2587726848. Its totient is φ = 316863360.

The previous prime is 1001202019. The next prime is 1001202023. The reversal of 1001202020 is 202021001.

1001202020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 1001201989 and 1001202007.

It is not an unprimeable number, because it can be changed into a prime (1001202023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 273236 + ... + 276875.

It is an arithmetic number, because the mean of its divisors is an integer number (53910976).

Almost surely, 2^1001202020 is an apocalyptic number.

1001202020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001202020 is an abundant number, since it is smaller than the sum of its proper divisors (1586524828).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1001202020 is a wasteful number, since it uses less digits than its factorization.

1001202020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550140 (or 550138 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 1001202020 is about 31641.7764987998. The cubic root of 1001202020 is about 1000.4005129013.

Adding to 1001202020 its reverse (202021001), we get a palindrome (1203223021).

The spelling of 1001202020 in words is "one billion, one million, two hundred two thousand, twenty".