1020021101020 has 24 divisors (see below), whose sum is σ = 2142083937168. Its totient is φ = 408000892800.

The previous prime is 1020021100997. The next prime is 1020021101069. The reversal of 1020021101020 is 201011200201.

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 = 1020021100988 and 1020021101006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 708480 + ... + 1594360.

It is an arithmetic number, because the mean of its divisors is an integer number (89253497382).

Almost surely, 2^{1020021101020} is an apocalyptic number.

1020021101020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020021101020 is an abundant number, since it is smaller than the sum of its proper divisors (1122062836148).

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

1020021101020 is a wasteful number, since it uses less digits than its factorization.

1020021101020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 943461 (or 943459 counting only the distinct ones).

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

Adding to 1020021101020 its reverse (201011200201), we get a palindrome (1221032301221).

The spelling of 1020021101020 in words is "one trillion, twenty billion, twenty-one million, one hundred one thousand, twenty".