1001102020020 has 72 divisors (see below), whose sum is σ = 3037117041504. Its totient is φ = 266921777088.

The previous prime is 1001102019997. The next prime is 1001102020031. The reversal of 1001102020020 is 200202011001.

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 = 1001102019984 and 1001102020011.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 850167 + ... + 1650753.

It is an arithmetic number, because the mean of its divisors is an integer number (42182181132).

Almost surely, 2^{1001102020020} is an apocalyptic number.

1001102020020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1001102020020 is an abundant number, since it is smaller than the sum of its proper divisors (2036015021484).

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

1001102020020 is a wasteful number, since it uses less digits than its factorization.

1001102020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807549 (or 807544 counting only the distinct ones).

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

Adding to 1001102020020 its reverse (200202011001), we get a palindrome (1201304031021).

The spelling of 1001102020020 in words is "one trillion, one billion, one hundred two million, twenty thousand, twenty".