1101021021020 has 48 divisors (see below), whose sum is σ = 2346311052288. Its totient is φ = 433913264640.

The previous prime is 1101021020959. The next prime is 1101021021043. The reversal of 1101021021020 is 201201201011.

It is a junction number, because it is equal to n+sod(n) for n = 1101021020992 and 1101021021010.

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 15 ways as a sum of consecutive naturals, for example, 973157 + ... + 1774563.

It is an arithmetic number, because the mean of its divisors is an integer number (48881480256).

Almost surely, 2^{1101021021020} is an apocalyptic number.

1101021021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1101021021020 is an abundant number, since it is smaller than the sum of its proper divisors (1245290031268).

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

1101021021020 is a wasteful number, since it uses less digits than its factorization.

1101021021020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802430 (or 802428 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1101021021020 its reverse (201201201011), we get a palindrome (1302222222031).

The spelling of 1101021021020 in words is "one trillion, one hundred one billion, twenty-one million, twenty-one thousand, twenty".