1000000001020 has 24 divisors (see below), whose sum is σ = 2101326663744. Its totient is φ = 399747302976.

The previous prime is 1000000000997. The next prime is 1000000001051. The reversal of 1000000001020 is 201000000001.

It is a Harshad number since it is a multiple of its sum of digits (4).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15761139 + ... + 15824458.

It is an arithmetic number, because the mean of its divisors is an integer number (87555277656).

Almost surely, 2^{1000000001020} is an apocalyptic number.

1000000001020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000000001020 is an abundant number, since it is smaller than the sum of its proper divisors (1101326662724).

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

1000000001020 is a wasteful number, since it uses less digits than its factorization.

1000000001020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31587189 (or 31587187 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 4.

Adding to 1000000001020 its reverse (201000000001), we get a palindrome (1201000001021).

The spelling of 1000000001020 in words is "one trillion, one thousand, twenty".