1012010020020 has 144 divisors (see below), whose sum is σ = 3147101455680. Its totient is φ = 263080742400.

The previous prime is 1012010020013. The next prime is 1012010020033. The reversal of 1012010020020 is 200200102101.

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 = 1012010019984 and 1012010020011.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9474471 + ... + 9580689.

It is an arithmetic number, because the mean of its divisors is an integer number (21854871220).

Almost surely, 2^{1012010020020} is an apocalyptic number.

1012010020020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1012010020020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1573550727840).

1012010020020 is an abundant number, since it is smaller than the sum of its proper divisors (2135091435660).

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

1012010020020 is a wasteful number, since it uses less digits than its factorization.

1012010020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107566 (or 107561 counting only the distinct ones).

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

Adding to 1012010020020 its reverse (200200102101), we get a palindrome (1212210122121).

The spelling of 1012010020020 in words is "one trillion, twelve billion, ten million, twenty thousand, twenty".