1020021021020 has 12 divisors (see below), whose sum is σ = 2142044144184. Its totient is φ = 408008408400.

The previous prime is 1020021021001. The next prime is 1020021021067. The reversal of 1020021021020 is 201201200201.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1020021020992 and 1020021021010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25500525506 + ... + 25500525545.

It is an arithmetic number, because the mean of its divisors is an integer number (178503678682).

Almost surely, 2^{1020021021020} is an apocalyptic number.

1020021021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020021021020 is an abundant number, since it is smaller than the sum of its proper divisors (1122023123164).

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

1020021021020 is a wasteful number, since it uses less digits than its factorization.

1020021021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51001051060 (or 51001051058 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1020021021020 its reverse (201201200201), we get a palindrome (1221222221221).

The spelling of 1020021021020 in words is "one trillion, twenty billion, twenty-one million, twenty-one thousand, twenty".