11021021012020 has 12 divisors (see below), whose sum is σ = 23144144125284. Its totient is φ = 4408408404800.

The previous prime is 11021021011927. The next prime is 11021021012069. The reversal of 11021021012020 is 2021012012011.

It can be written as a sum of positive squares in 2 ways, for example, as 1461187769616 + 9559833242404 = 1208796^2 + 3091898^2 .

It is a super-3 number, since 3×11021021012020³ (a number of 40 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 275525525281 + ... + 275525525320.

It is an arithmetic number, because the mean of its divisors is an integer number (1928678677107).

Almost surely, 2^{11021021012020} is an apocalyptic number.

11021021012020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11021021012020 is an abundant number, since it is smaller than the sum of its proper divisors (12123123113264).

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

11021021012020 is a wasteful number, since it uses less digits than its factorization.

11021021012020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551051050610 (or 551051050608 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 11021021012020 its reverse (2021012012011), we get a palindrome (13042033024031).

Subtracting from 11021021012020 its reverse (2021012012011), we obtain a palindrome (9000009000009).

The spelling of 11021021012020 in words is "eleven trillion, twenty-one billion, twenty-one million, twelve thousand, twenty".