1020011002020 has 144 divisors (see below), whose sum is σ = 3377502623040. Its totient is φ = 257686966656.

The previous prime is 1020011001983. The next prime is 1020011002033. The reversal of 1020011002020 is 202001100201.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 1020011001993 and 1020011002011.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5430787 + ... + 5615466.

Almost surely, 2^{1020011002020} is an apocalyptic number.

1020011002020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020011002020 is an abundant number, since it is smaller than the sum of its proper divisors (2357491621020).

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

1020011002020 is a wasteful number, since it uses less digits than its factorization.

1020011002020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11046296 (or 11046282 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 1020011002020 its reverse (202001100201), we get a palindrome (1222012102221).

The spelling of 1020011002020 in words is "one trillion, twenty billion, eleven million, two thousand, twenty".