1101220020020 has 24 divisors (see below), whose sum is σ = 2312587501224. Its totient is φ = 440483158656.

The previous prime is 1101220020011. The next prime is 1101220020049. The reversal of 1101220020020 is 200200221011.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 143589460624 + 957630559396 = 378932^2 + 978586^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1101220019983 and 1101220020010.

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, 1977602 + ... + 2472518.

It is an arithmetic number, because the mean of its divisors is an integer number (96357812551).

Almost surely, 2^{1101220020020} is an apocalyptic number.

1101220020020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1101220020020 is an abundant number, since it is smaller than the sum of its proper divisors (1211367481204).

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

1101220020020 is a wasteful number, since it uses less digits than its factorization.

1101220020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606179 (or 606177 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1101220020020 its reverse (200200221011), we get a palindrome (1301420241031).

The spelling of 1101220020020 in words is "one trillion, one hundred one billion, two hundred twenty million, twenty thousand, twenty".