1020022021020 has 96 divisors (see below), whose sum is σ = 2897184568320. Its totient is φ = 268104628480.

The previous prime is 1020022020989. The next prime is 1020022021033. The reversal of 1020022021020 is 201202200201.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1020022020987 and 1020022021005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1908766 + ... + 2383994.

It is an arithmetic number, because the mean of its divisors is an integer number (30179005920).

Almost surely, 2^{1020022021020} is an apocalyptic number.

1020022021020 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 1020022021020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1448592284160).

1020022021020 is an abundant number, since it is smaller than the sum of its proper divisors (1877162547300).

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

1020022021020 is a wasteful number, since it uses less digits than its factorization.

1020022021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475755 (or 475753 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 1020022021020 its reverse (201202200201), we get a palindrome (1221224221221).

The spelling of 1020022021020 in words is "one trillion, twenty billion, twenty-two million, twenty-one thousand, twenty".