20111021020020 has 48 divisors (see below), whose sum is σ = 64355267265408. Its totient is φ = 4596804804480.

The previous prime is 20111021020001. The next prime is 20111021020037. The reversal of 20111021020020 is 2002012011102.

20111021020020 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

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 = 20111021019978 and 20111021020005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23941691271 + ... + 23941692110.

It is an arithmetic number, because the mean of its divisors is an integer number (1340734734696).

Almost surely, 2^{20111021020020} is an apocalyptic number.

20111021020020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20111021020020 is an abundant number, since it is smaller than the sum of its proper divisors (44244246245388).

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

20111021020020 is a wasteful number, since it uses less digits than its factorization.

20111021020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47883383400 (or 47883383398 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20111021020020 its reverse (2002012011102), we get a palindrome (22113033031122).

The spelling of 20111021020020 in words is "twenty trillion, one hundred eleven billion, twenty-one million, twenty thousand, twenty".