1010021200020 has 144 divisors (see below), whose sum is σ = 3502887792768. Its totient is φ = 230764343040.

The previous prime is 1010021199947. The next prime is 1010021200061. The reversal of 1010021200020 is 200021200101.

1010021200020 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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 = 1010021199975 and 1010021200011.

It is a congruent number.

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, 2831727 + ... + 3168393.

It is an arithmetic number, because the mean of its divisors is an integer number (24325609672).

Almost surely, 2^{1010021200020} is an apocalyptic number.

1010021200020 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 1010021200020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1751443896384).

1010021200020 is an abundant number, since it is smaller than the sum of its proper divisors (2492866592748).

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

1010021200020 is a wasteful number, since it uses less digits than its factorization.

1010021200020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339070 (or 339065 counting only the distinct ones).

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

Adding to 1010021200020 its reverse (200021200101), we get a palindrome (1210042400121).

The spelling of 1010021200020 in words is "one trillion, ten billion, twenty-one million, two hundred thousand, twenty".