1012210001020 has 72 divisors (see below), whose sum is σ = 2244525522624. Its totient is φ = 383382744192.

The previous prime is 1012210001003. The next prime is 1012210001029. The reversal of 1012210001020 is 201000122101.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1012210000988 and 1012210001006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012210001029) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 14860882 + ... + 14928838.

It is an arithmetic number, because the mean of its divisors is an integer number (31173965592).

Almost surely, 2^{1012210001020} is an apocalyptic number.

1012210001020 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 1012210001020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1122262761312).

1012210001020 is an abundant number, since it is smaller than the sum of its proper divisors (1232315521604).

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

1012210001020 is a wasteful number, since it uses less digits than its factorization.

1012210001020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70067 (or 70046 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1012210001020 its reverse (201000122101), we get a palindrome (1213210123121).

The spelling of 1012210001020 in words is "one trillion, twelve billion, two hundred ten million, one thousand, twenty".