1020202102020 has 24 divisors (see below), whose sum is σ = 2856565885824. Its totient is φ = 272053893856.

The previous prime is 1020202101991. The next prime is 1020202102033. The reversal of 1020202102020 is 202012020201.

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 = 1020202101987 and 1020202102005.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8501684124 + ... + 8501684243.

It is an arithmetic number, because the mean of its divisors is an integer number (119023578576).

Almost surely, 2^{1020202102020} is an apocalyptic number.

1020202102020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1020202102020 is an abundant number, since it is smaller than the sum of its proper divisors (1836363783804).

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

1020202102020 is a wasteful number, since it uses less digits than its factorization.

1020202102020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17003368379 (or 17003368377 counting only the distinct ones).

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

Adding to 1020202102020 its reverse (202012020201), we get a palindrome (1222214122221).

The spelling of 1020202102020 in words is "one trillion, twenty billion, two hundred two million, one hundred two thousand, twenty".