1012002020 has 24 divisors (see below), whose sum is σ = 2126552064. Its totient is φ = 404544096.

The previous prime is 1012002011. The next prime is 1012002023. The reversal of 1012002020 is 202002101.

It is a junction number, because it is equal to n+sod(n) for n = 1012001989 and 1012002007.

It is not an unprimeable number, because it can be changed into a prime (1012002023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18047 + ... + 48473.

It is an arithmetic number, because the mean of its divisors is an integer number (88606336).

Almost surely, 2^1012002020 is an apocalyptic number.

1012002020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1012002020 is an abundant number, since it is smaller than the sum of its proper divisors (1114550044).

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

1012002020 is a wasteful number, since it uses less digits than its factorization.

1012002020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32099 (or 32097 counting only the distinct ones).

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

The square root of 1012002020 is about 31811.9791902359. The cubic root of 1012002020 is about 1003.9847738203.

Adding to 1012002020 its reverse (202002101), we get a palindrome (1214004121).

The spelling of 1012002020 in words is "one billion, twelve million, two thousand, twenty".