20111022021020 has 48 divisors (see below), whose sum is σ = 49443683421888. Its totient is φ = 6727031754240.

The previous prime is 20111022021019. The next prime is 20111022021031. The reversal of 20111022021020 is 2012022011102.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 20111022020986 and 20111022021004.

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, 1751825447 + ... + 1751836926.

It is an arithmetic number, because the mean of its divisors is an integer number (1030076737956).

Almost surely, 2^{20111022021020} is an apocalyptic number.

20111022021020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20111022021020 is an abundant number, since it is smaller than the sum of its proper divisors (29332661400868).

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

20111022021020 is a wasteful number, since it uses less digits than its factorization.

20111022021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3503662430 (or 3503662428 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20111022021020 its reverse (2012022011102), we get a palindrome (22123044032122).

The spelling of 20111022021020 in words is "twenty trillion, one hundred eleven billion, twenty-two million, twenty-one thousand, twenty".